Placental weight and its relationship with the birth weight of term infants and body mass index of the mothers.

OBJECTIVE: Placental pathology is a well-known cause of perinatal and neonatal mortality and morbidity, and may correlate with placental growth, which can be assessed indirectly by anthropometric placental measurements. The aim of this cross-sectional study was to investigate mean placental weight and its relationship with birthweight and maternal body mass index (BMI). METHODS: Fresh (not formalin fixed) consecutively delivered placentae of term newborns (37-42 weeks), collected between February 2022 and August 2022, and the mothers and newborns, were included. Mean placental weight, birthweight and maternal BMI were calculated. Pearson's correlation coefficient, linear regression, and one-way analysis of variance were used to analyse continuous and categorical data. RESULTS: Out of 390 samples, 211 placentae (with 211 newborns and mothers) were included in this study after exclusion criteria were applied. Mean placental weight was 494.45 ± 110.39 g, and mean term birth weight/placental weight ratio was 6.21 ± 1.21 (range, 3.35-11.62 g). Placental weight was positively correlated with birthweight and maternal BMI, but not with newborn sex. Linear regression effect estimation of placental weight on birthweight revealed a medium correlation (R2 = 0.212; formula, 1.4553 × X + 2246.7, where X is placental weight [g]). CONCLUSION: Placental weight was revealed to positively correlate with birthweight and maternal BMI.

Sex estimation of skeletons in middle and late adulthood: reliability of pelvic morphological traits and long bone metrics on an Italian skeletal collection.

There are several metric and morphological methods available for sex estimation of skeletal remains, but their reliability and applicability depend on the sexual dimorphism of the remains as well as on the availability of preserved bones. Some studies showed that age-related changes on bones can cause misclassification of sex. The purpose of this study was to establish the reliability of pelvic morphological traits and metric methods of sex estimation on relatively old individuals from a modern Italian skeletal collection. The data for this study were obtained from 164 individuals of the Milano CAL skeletal collection and average age of the samples was 75 years. In the pelvic morphological method, the recalibrated regression formula of Klales and colleagues (2012), pre-auricular sulcus, and greater sciatic notch morphology were used for sex estimation. With regard to the metric method, 15 standard measurements from upper and lower limbs were analyzed for sexual dimorphism. The results showed that in pelvic morphological approach, the application of regression formula of the revised Klales and colleague formula (2017) resulted in 100% accuracy. Classification rates of metric methods vary from 75.19 to 90.73% with the maximum epiphyseal breadth of proximal tibia representing the most discriminant parameter. This study confirms that the effect of age on sex estimation methods is not substantial, and both metric and morphological methods of sex estimation can be reliably applied to individuals of Italian descent in middle and late adulthood.