Name Info Provider Link
subscription/membership/fee required Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S0266-6138(14)00253-8
Childbirth Problems free resource MedlinePlus Health Information https://medlineplus.gov/childbirthproblems.html
Childbirth Problems free resource MedlinePlus Consumer Health Information https://medlineplus.gov/childbirthproblems.html