Discovery of new genetic loci for male sexual orientation in Han population.

Epidemiological studies have demonstrated that the genetic factors partly influence the development of same-sex sexual behavior, but most genetic studies have focused on people of primarily European ancestry, potentially missing important biological insights. Here, we performed a two-stage genome-wide association study (GWAS) with a total sample of 1478 homosexual males and 3313 heterosexual males in Han Chinese populations and identified two genetic loci (rs17320865, Xq27.3, FMR1NB, Pmeta = 8.36 × 10-8, OR = 1.29; rs7259428, 19q12, ZNF536, Pmeta = 7.58 × 10-8, OR = 0.75) showing consistent association with male sexual orientation. A fixed-effect meta-analysis including individuals of Han Chinese (n = 4791) and European ancestries (n = 408,995) revealed 3 genome-wide significant loci of same-sex sexual behavior (rs9677294, 2p22.1, SLC8A1, Pmeta = 1.95 × 10-8; rs2414487, 15q21.3, LOC145783, Pmeta = 4.53 × 10-9; rs2106525, 7q31.1, MDFIC, Pmeta = 6.24 × 10-9). These findings may provide new insights into the genetic basis of male sexual orientation from a wider population scope. Furthermore, we defined the average ZNF536-immunoreactivity (ZNF536-ir) concentration in the suprachiasmatic nucleus (SCN) as lower in homosexual individuals than in heterosexual individuals (0.011 ± 0.001 vs 0.021 ± 0.004, P = 0.013) in a postmortem study. In addition, compared with heterosexuals, the percentage of ZNF536 stained area in the SCN was also smaller in the homosexuals (0.075 ± 0.040 vs 0.137 ± 0.103, P = 0.043). More homosexual preference was observed in FMR1NB-knockout mice and we also found significant differences in the expression of serotonin, dopamine, and inflammation pathways that were reported to be related to sexual orientation when comparing CRISPR-mediated FMR1NB knockout mice to matched wild-type target C57 male mice.

Psychometric properties of the Clinically Useful Depression Outcome Scale supplemented with DSM-5 Mixed subtype questionnaire in Chinese patients with mood disorders.

BACKGROUND: With the modification of DSM-5 mixed features specifier, a brief scale to screen mixed features in patients with mood disorders is needed in clinical practice. This study aimed to explore the psychometric properties of the Chinese version of the Clinically Useful Depression Outcome Scale supplemented with DSM-5 Mixed subtype (CUDOS-M-C) for the Chinese patients with mood disorders. METHODS: Overall, 300 patients with major depressive episode were recruited. All participants were assessed using CUDOS-M-C, Young Mania Rating Scale, Hamilton Anxiety Scale and Montgomery-Asberg Depression Rating Scale. The receiver operating characteristic (ROC) curve analysis was used to calculate the optimal cut-off values of CUDOS-M-C score. The reliability and validity of CUDOS-M-C were examined using Cronbach's alpha, intraclass correlation coefficient (ICC) and principal component analysis (PCA). RESULTS: The results of PCA indicated two-factor structure as the best solution for CUDOS-M-C, which explained 54.82% of cumulative variance. The Cronbach's alpha was 0.892 and the ICC was 0.853. The area under the ROC curve of the CUDOS-M-C for participants with mixed depression was 0.927 (p<0.001) and the suitable cut-off value was 8, with a sensitivity of 91.6% and specificity of 79.9%. LIMITATIONS: Most of the patients were recruited from eastern China and further research with larger sample is warranted. And this study did not perform confirmatory factor analysis to identify the generalization of factor structure of CUDOS-M-C. Besides, the study performed the test-retest reliability of CUDOS-M-C and further analysis is needed to ascertain the patient's post-treatment changes. CONCLUSION: The CUDOS-M-C demonstrated to have satisfactory psychometric properties as a self-report scale, and could be applied to screen patients with mixed depression in clinical practice.

Interpersonal psychotherapy-based psychological intervention for patient suffering from COVID-19: A case report.

BACKGROUND: Novel coronavirus disease 2019 (COVID-19) was first found in Wuhan, China, and it has rapidly spread worldwide since the end of 2019. There is an urgent need to treat the physical and psychological aspects of COVID-19. Interpersonal psychotherapy (IPT)-based psychological intervention is an evidence-based therapy for depression and post-traumatic stress disorder. CASE SUMMARY: This report describes a case of COVID-19 in a patient who transmitted the disease to his entire family. The patient received four sessions of IPT-based psychological intervention. We used the Hamilton Rating Scale for Depression and Patient Health Questionnaire to measure depression level, and the Hamilton Anxiety Scale and Generalized Anxiety Disorder to measure anxiety among the patients. CONCLUSION: This case shows that IPT-based therapy can reduce COVID-19 patient depression and anxiety and the advantage of IPT-based therapy.

Executive function and its relation to anatomical connectome in homosexual and heterosexual men.

BACKGROUND: Sexual orientation has been suggested to affect executive function, of which the neurobiological basis is still largely unknown. In this study, we explored the interrelationship between neuropsychological characteristics in homosexual and heterosexual men and their anatomical connectome by graph theoretical analysis. METHODS: Fifty-three homosexual and 47 heterosexual males underwent diffusion tensor magnetic resonance imaging (MRI) and neuropsychological assessments. Whole-brain anatomical networks were constructed using white matter tractography, performed on the diffusion tensor imaging data. Neuropsychological tests included the Wisconsin Card Sorting Test (WCST), the Continuous Performance Test (CPT) and the Trail-Making Test (TMT). RESULTS: The cognitive performance of homosexual men was significantly poorer than their heterosexual counterparts in terms of WCST total correct responses. Anatomical connectome analysis revealed a lower (P=0.001) anatomical connectivity between left PoCG and left SMG (P=0.003) in homosexual men as compared to heterosexual men. Linear regression analyses showed that the WCST total correct responses score was significantly linked with sexual orientation (P=0.001). The anatomical connectivity strength between left PoCG and left SMG was also shown to be significantly correlated with sexual orientation (P=0.039) and education (P=0.047). CONCLUSIONS: Our study demonstrated the differences in the performance of WCST and anatomical connectome of large-scale brain networks between homosexual and heterosexual men, extending our understanding of the brain's circuitry and the characteristics of executive function in men of different sexual orientation.

Investigation of the psychological status of suspected patients during the Coronavirus disease 2019 epidemic.

We explored the psychological changes in suspected patients during the coronavirus disease 2019 (COVID-19) epidemic and obtained evidence for early psychological guidance and intervention in this group. A total of 31 inpatients with suspected COVID-19 were identified at our hospital. The depression module of the Patient Health Questionnaire (PHQ-9), the General Anxiety Disorder (GAD)-7 scale, and the Self-Reporting Questionnaire (SRQ-20) mental health self-assessment questionnaire were used to assess depression, anxiety, and overall mental health. Among the patients, 32.3% had symptoms of depression and 19.4% had symptoms of anxiety. Levels of anxiety and fear varied. In comparing the PHQ-9 and 7-item Generalized Anxiety Disorder Scale scores of suspected and confirmed patients, there was no significant difference in the distribution of severity of anxiety or depression in the 2 groups. The PHQ-9 scores indicated mild depression symptoms in 25.8% of suspected patients, moderate symptoms in 0%, and severe symptoms in 6.5%. Overall, 50% of confirmed patients had symptoms, with 30.8% classified as mild, 15.4% classified as moderate, and 3.8% classified as severe. The 7-item Generalized Anxiety Disorder Scale scores in the group of suspected patients showed that 9.7% had mild symptoms, 0% had moderate symptoms, and 9.7% had severe symptoms. In the group of confirmed patients, 38.4% had symptoms (34.6% mild, 0% moderate, and 3.8% severe). Diagnosed patients had more visible symptoms of depression and different total PHQ-9 scores. During the COVID-19 epidemic, suspected and diagnosed patients had different levels of mental health problems. Diagnosed patients had more visible symptoms. The performance of suspected patients was higher, but their mental state was more polarized. It may thus be important to monitor the psychological state of suspected patients as early as possible to enable timely interventions that promote psychological rehabilitation.

Dialectical behavior therapy-based psychological intervention for woman in late pregnancy and early postpartum suffering from COVID-19: a case report.

At the end of 2019, a new form of pneumonia disease known as the corona virus disease 2019 (COVID-19) rapidly spread throughout most provinces of China, and the total global number of COVID-19 cases has surpassed 500 000 by Mar. 27, 2020 (WHO, 2020). On Jan. 30, 2020, the World Health Organization (WHO) declared COVID-19 a global health emergency (WHO, 2020). COVID-19 causes most damage to the respiratory system, leading to pneumonia or breathing difficulties. The confirmed case fatality risk (cCFR) was estimated to be 5% to 8% (Jung et al., 2020). Besides physical pain, COVID-19 also induces psychological distress, with depression, anxiety, and stress affecting the general population, quarantined population, medical staff, and patients at different levels (Kang et al., 2020; Xiang et al., 2020). Previous research on patients in isolation wards highlighted the risk of depressed mood, fear, loneliness, frustration, excessive worries, and insomnia (Abad et al., 2010).

Efficacy of internet-based integrated intervention on depression and anxiety symptoms in patients with COVID-19.

Public health crises, such as the outbreak of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) since Dec. 2019, are widely acknowledged as severe traumatic events that impose threats not only because of physical concerns but also because of the psychological distress of infected patients. We designed an internet-based integrated intervention and evaluated its efficacy on depression and anxiety symptoms in patients infected by SARS-CoV-2.

Relationships between dorsolateral prefrontal cortex metabolic change and cognitive impairment in first-episode neuroleptic-naive schizophrenia patients.

The present study aimed to explore the possible associations between the dorsolateral prefrontal cortex (DLPFC) metabolites and the cognitive function in first-episode schizophrenia (FES).This study included 58 patients with FES (29 males and 29 females; mean age, 22.66 ±â€Š7.64 years) recruited from the First Affiliated Hospital, College of Medicine, Zhejiang University, and 43 locally recruited healthy controls (16 males and 27 females; mean age, 23.07 ±â€Š7.49 years). The single-voxel proton magnetic resonance spectroscopy was used to measure the levels of N-acetylaspartate (NAA); complex of glutamate, glutamine, and γ-aminobutyric acid (Glx); choline-containing compounds; and myo-inositol in the DLPFC. The ratios of metabolites to creatine (Cr) were calculated. The cognitive function was assessed by Measurement and Treatment Research to Improve Cognition in Schizophrenia Consensus Cognitive Battery (MCCB). Correlation analysis was used to assess the relationships between the DLPFC metabolites and the cognitive function.Compared with the healthy controls, the patients with FES showed significantly reduced scores in each part of the MCCB, significantly reduced NAA/Cr, and significantly increased Glx/Cr in the left DLPFC. Poor performance in verbal learning and visual learning was correlated to the reduced NAA/Cr ratio in the left DLPFC.These findings suggest that a lower NAA/Cr ratio in the left DLPFC is associated with the cognitive deficits in patients with FES, and may be an early biochemical marker for the cognitive impairment in schizophrenia.

Circulating T lymphocyte subsets, cytokines, and immune checkpoint inhibitors in patients with bipolar II or major depression: a preliminary study.

This study aimed to investigate the less known activation pattern of T lymphocyte populations and immune checkpoint inhibitors on immunocytes in patients with bipolar II disorder depression (BD) or major depression (MD). A total of 23 patients with BD, 22 patients with MD, and 20 healthy controls (HCs) were recruited. The blood cell count of T lymphocyte subsets and the plasma level of cytokines (IL-2, IL-4, IL-6, IL-10, TNF-α, and IFN-γ) were selectively investigated. The expression of T-cell immunoglobulin and mucin-domain containing-3 (TIM-3), programmed cell death protein 1 (PD-1) and its ligands, PD-L1 and PD-L2, on T lymphocytes and monocytes, was detected. In results, blood proportion of cytotoxic T cells significantly decreased in BD patients than in either MD patients or HCs. The plasma level of IL-6 increased in patients with BD and MD. The expression of TIM-3 on cytotoxic T cells significantly increased, whereas the expression of PD-L2 on monocytes significantly decreased in patients with BD than in HCs. These findings extended our knowledge of the immune dysfunction in patients with affective disorders.

Efficacy of repetitive transcranial magnetic stimulation with quetiapine in treating bipolar II depression: a randomized, double-blinded, control study.

The clinical and cognitive responses to repetitive transcranial magnetic stimulation (rTMS) in bipolar II depressed patients remain unclear. In this study, thirty-eight bipolar II depressed patients were randomly assigned into three groups: (i) left high-frequency (n = 12), (ii) right low-frequency (n = 13), (iii) sham stimulation (n = 13), and underwent four-week rTMS with quetiapine concomitantly. Clinical efficacy was evaluated at baseline and weekly intervals using the 17-item Hamilton Depression Rating Scale (HDRS-17) and Montgomery-Asberg Depression Rating Scale (MADRS). Cognitive functioning was assessed before and after the study with the Wisconsin Card Sorting Test (WCST), Stroop Word-Color Interference Test (Stroop), and Trail Making Test (TMT). Thirty-five patients were included in the final analysis. Overall, the mean scores of both the HDRS-17 and the MADRS significantly decreased over the 4-week trial, which did not differ among the three groups. Exploratory analyses revealed no differences in factor scores of HDRS-17s, or in response or remission rates. Scores of WCST, Stroop, or TMT did not differ across the three groups. These findings indicated active rTMS combined with quetiapine was not superior to quetiapine monotherapy in improving depressive symptoms or cognitive performance in patients with bipolar II depression.

Cross-cultural difference and validation of the Chinese version of Montreal Cognitive Assessment in older adults residing in Eastern China: preliminary findings.

To evaluate the psychometric properties of the Chinese Montreal Cognitive Assessment (MoCA-C) and assess cross-cultural differences in a community-based cohort residing in the Eastern China. The study included 72 patients with Alzheimer's disease (AD), 84 patients with mild cognitive impairment (MCI) and 146 cognitively normal controls. Sensitivities and specificities were calculated using the recommended cut-off scores. Receiver operator characteristic (ROC) curve analyses were performed to determine optimal sensitivity and specificity. Criterion validity, inter-rater, test-retest reliability and internal consistencies of the MoCA-C were examined, and clinical observations made. The influence of age, education level and gender on MoCA score was examined. Using the recommended cut-off score of 26, the area under the ROC (AUC) for predicting MCI groups using the MoCA-C was 0.930 (95%CI: 0.894; 0.965). The MoCA-C demonstrated 92% sensitivity and 85% specificity in screening for MCI. Cultural differences from the original MoCA affected the test response rate. The MoCA-C appears to have utility as a cognitive screen for early detection of AD and for MCI and warrants further investigation regarding its applicability in primary care settings in elderly Chinese people. It will be necessary to revise the contents of the questionnaire to account for by local characteristics.

[Spatial distribution characteristics of urban potential population in Shenyang City based on QuickBird image and GIS].

Population is the most active factor affecting city development. To understand the distribution characteristics of urban population is of significance for making city policy decisions and for optimizing the layout of various urban infrastructures. In this paper, the information of the residential buildings in Shenyang urban area was extracted from the QuickBird remote sensing images, and the spatial distribution characteristics of the population within the Third-Ring Road of the City were analyzed, according to the social and economic statistics data. In 2010, the population density in different types of residential buildings within the Third-Ring Road of the City decreased in the order of high-storey block, mixed block, mixed garden, old multi-storey building, high-storey garden, multi-storey block, multi-storey garden, villa block, shanty, and villa garden. The vacancy rate of the buildings within the Third-Ring Road was more than 30%, meaning that the real estate market was seriously overstocked. Among the five Districts of Shenyang City, Shenhe District had the highest potential population density, while Tiexi District and Dadong District had a lower one. The gravity center of the City and its five Districts was also analyzed, which could provide basic information for locating commercial facilities and planning city infrastructure.

Repetitive transcranial magnetic stimulation in combination with citalopram in young patients with first-episode major depressive disorder: a double-blind, randomized, sham-controlled trial.

OBJECTIVES: To evaluate the effectiveness of repetitive transcranial magnetic stimulation (rTMS) started with citalopram in first-episode young major depressive patients. METHODS: In a 2-week double-blind study with a 2-week extended antidepressant phase, 60 first-episode young major depressive patients were randomly assigned to citalopram in combination with 2 weeks of either active or sham rTMS treatment. During the following 2 weeks, the patients continued only the citalopram treatment. The 17-item Hamilton depression rating scale (HAMD-17) and Montgomery-Asberg depression rating scale (MADRS) were used to assess the severity of depression. Moreover, the Wisconsin Card Sorting Test (WCST), Trail-Making Test (TMT), and Stroop Color-Word Test (SCWT) were used to assess executive function. RESULTS: (1) There was a significantly greater number of early improvers (a reduction of HAMD-17 score ≥ 20% within the first 2 weeks) observed in the active rTMS group compared to the sham group (57% vs. 29%, χ(2)=4.667, p=0.031). (2) There was no significant difference observed in responder rates (46% vs. 36%, χ(2)=0.295, p=0.586) or in remission rates (39% vs. 29%, χ(2)=0.319, p=0.572) between the two groups at 4 weeks. (3) There was a significant difference seen in both HAMD-17 and MADRS scores between the two groups at 2 and 4 weeks. The active rTMS group showed a significantly faster score reduction compared to the sham group at 2 weeks (HAMD-17, t=13.444, p=0.001; MADRS, t=30.123, p=0.000), which was maintained at 4 weeks on both scales (HAMD-17, t=46.915, p=0.000; MADRS, t=39.996, p=0.000). (4) The patients did not deteriorate in executive performance, and even improved in categories on WCST and completed TMT faster in the active group. CONCLUSIONS: RTMS accelerated the rapidity of the antidepressant response in first-episode young depressive patients. Our results call for future rTMS studies with larger sample sizes, high intensity of stimuli, and longer duration to draw more definitive conclusions.

[Repetitive transcranial magnetic stimulation combined with antidepressant medication in treatment of first-episode patients with major depression].

OBJECTIVE: To assess the early therapeutic and cognitive effect of repetitive transcranial magnetic stimulation (rTMS) combined with antidepressant medication in treatment of first-episode patients with major depression. METHODS: Sixty first-episode depressed inpatients aged 18-45 y, who met the DSM-IV clinical criteria for major depressive episode were randomly assigned to citalopram treatment (20 mg/d) in combination with a two-week period of either rTMS (study group)or sham procedure (control group) on left dorsal-lateral prefrontal cortex (10 Hz, 90% motor threshold). The Hamilton Depression Rating Scale (HAMD) was used to assess the severity of depression. The Wisconsin Card Sorting Test (WCST) and Continuous Performance Test (CPT) were used to assess cognitive function of depression. RESULT: The response rate was significantly greater in the study group compared to the control group after treatment (57% compared with 29%,P<0.05). The HAMD scores significantly declined after treatment in two groups, and the study group showed lower scores compared to the control group after 2 weeks (P<0.01). Neuropsychological assessments showed that there was no significant difference between the two groups except for the significant improvement in the categories on WCST in study group compared to the baseline (P<0.05) and the control group (P<0.05)after 2 weeks treatment. No serious event occurred in the patients during the rTMS study. CONCLUSION: 10 Hz rTMS enhances early effects of citalopram and improves cognitive function in first-episode major depressive patients.

[Urban vegetation coverage change inside the Third-Ring Road of Shenyang City, China: a study with linear spectral unmixing technique].

Based on the Landsat TM images of 2001 and 2006, and by using linear spectral unmixing (LSU) technique, the information of urban vegetation coverage inside the Third-Ring Road of Shenyang City was extracted, and the dynamic change of the vegetation coverage in 2001-2006 was analyzed, in combining with a land use map derived from the visual interpretation of a QuickBird image of 2006. The results showed that in 2001-2006, the urban vegetation coverage in study area changed drastically. Urban greening and the cropland encroachment caused by urban sprawl coexisted, and the vegetation gain from urban greening was larger than the vegetation loss from cropland encroachment. The vegetation coverage of road, residence, public facilities, and park and square increased with varying degrees (5%-9%), while industrial land changed little. The spatial distribution of urban greening was relatively reasonable. Though the polarization of vegetation coverage between central city and suburban still existed, this polarization had been mitigated to some extent. With the increase of the distance from city center, the vegetation coverage increased in sequence of park and square (0.8% x km(-1)) < residence (1.5% x km(-1)) < industrial land (1.7% x km(-1)) < public facilities (2.4% x km(-1)) < road (2.9% x km(-1)). The polarization of vegetation coverage in public facilities and road were still serious, suggesting that more greening programs and strict conservation efforts were needed.

[Nephrotoxicity of tacrolimus and preventive effect of diltiazem: experiment with rats].

OBJECTIVE: To study the nephrotoxicity tacrolimus (FK506) at the therapeutic dose the preventive effect of diltiazem (Dil), a calcium antagonist against the FK506-induced pathological changes. METHODS: 24 Sprague-Dawley male rats were randomly divided into 4 equal groups: cyclosporine A (CsA) group, undergoing treatment of CsA at the therapeutic dose after kidney transplantation (25 mg x kg(-1) x d(-1)) for 4 weeks, FK506 group treated with FK506 (0.8 mg x kg(-1) x d(-1)), FK506 + Dil group treated with FK506 (0.8 mg x kg(-1) x d(-1)) and Dil at the dose of 8 mg x kg(-1) x d(-1), and control group. Four weeks later body weight was measured and 24 h urine sample was collected. Then the rats were killed. Their kidneys underwent light and transmission electron microscopy. RESULTS: The body weight ad weight gain, and the weights of both kidney of the CsA group were all significantly lower than those of the other 3 groups (all P < 0.05), and there were not significant differences in there parameters among the other 3 groups. The serum creatinine levels of the FK506 and CsA groups were (36.0 +/- 2.6) and (34.2 +/- 4.5) micromol/L respectively, both significantly higher than those of the FK506 + Dil and control groups [(28.5 +/- 2.1) and (29.2 +/- 3.428) micromol/L respectively, all P < 0.05], however, there was no significant difference between the FK506 + Dil and control groups. The creatinine clearance rate of the FK506 and CsA groups were (0.63 +/- 0.45) and (0.58 +/- 0.39) ml x min(-1) x 100 g(-1) respectively, significantly lower than those of the FK506 + Dil and control groups [(1.55 +/- 0.91) and (1.02 +/- 0.62) mlxmin(-1) x 100 g(-1) respectively, all P < 0.05]. Pathological examination showed epithelial cell cloudy swelling and vacuolization and interstitial fibrosis in the renal tubules, mitochondria swelling and vacuolization in renal tubular epithelial cells, renal arteriole hyalinization, and foot cell conjugation glomerulus, mitochondria swelling and vacuolization in the FK506 and CsA groups, and such changes were relatively mild in the FK506 + Dil group. CONCLUSION: FK506 at renal transplantation therapeutic dose, as well as CsA, induces pathological changes in renal tissues and ultrastructural organization. Dil is able to prevent FK506-induced these pathological changes.

[A survey of mental health among transferred injured survivors in Wenchuan earthquake in Sichuan].

OBJECTIVE: To assess the depression and anxious status among transferred injured survivors in Wenchuan earthquake in Sichuan province. METHODS: A total of 43 transferred injured survivors were investigated by questionnaire exploring their trauma symptoms and mental health status. RESULTS: High rates of trauma symptoms were remarkably observed in these survivors. Of all the respondents, 60% had some emotional symptoms and sleeping difficulties. About one third of respondents experienced recurrent and intrusive distressing recollection of event, 16 (37.21%) experienced nightmare, 15 (34.88%) had flashback and 7 (16.28%) of them tried to avoid relative stress. CONCLUSION: Many mental symptoms were observed in transferred injured survivors. The two major factors of mental stress were emotional symptoms and re-experience of the disaster.

[Effect of exogenous androgen on structures of sexually dimorphism nucleus in preoptic area and anteroventral periventricular nucleus before sexual differentiation in female rats].

OBJECTIVE: To investigate the effects of androgen on sexually dimorphism nucleus in preoptic area (SDN-POA) and anteroventral periventricular nucleus (AVPV) before sexual differentiation of the brain in female rats. METHODS: Neonatal female SD rats (n=12) were randomly divided into two groups: androgen group and control group. Twenty-four hours after birth animals were subjected to intraperitoneal injection of 50 microl of testosterone propionate (TP,10.0 g/L) or aseptic oil as control. The rats were sacrificed 60 days after the injection and the brains were collected for crystal violet staining. LEICA Q Win system was applied in detecting the boundaries of SDN-POA and AVPV, then the volumes of SDN-POA and AVPV were calculated. RESULTS: The volumes of SDN-POA in androgen group were significantly larger than those in control group [(16.77+/-2.68) vs (8.99+/-1.42)mm(3)x10(-3), P<0.01], while the volumes of AVPV in androgen group were significantly smaller than those in control group [(9.14+/-1.16) vs (14.62+/-2.80)mm(3)x10(-3), P<0.01]. CONCLUSION: Exogenous androgen rendered before sexual differentiation in female rats results in enlargement of SDN-POA volumes and reduction of AVPV.