Obstetrics is the field of study focused on pregnancy, labor and the baby blues period. As a clinical forte, obstetrics is joined with gynecology under the order known as obstetrics and gynecology (OB/GYN), which is a careful field.

Hereditary screening for Down disorder (trisomy 21) and Edwards condition (trisomy 18), the national standard in the United States, is quickly advancing ceaselessly from the AFP-quad screen, done commonly in the second trimester at 16–18 weeks. The fresher coordinated screen (in the past called F.A.S.T.E.R for First And Second Trimester Early Results) should be possible at 10 or more weeks to 13 or more weeks with a ultrasound of the fetal neck (thicker nuchal skin connects with higher danger of Down condition being available) and two synthetic concoctions (analytes), pregnancy-related plasma protein An and human chorionic gonadotropin (pregnancy hormone level itself). It gives an exact hazard profile early. A subsequent blood screen at 15 to 20 weeks refines the hazard all the more precisely. The expense is higher than an "AFP-quad" screen because of the ultrasound and second blood test, however it is cited to have a 93% get rate instead of 88% for the standard AFP/QS. This is a developing standard of care in the United States.