Obstetrics and Gynaecology O&G specialist offer medical treatment of the female reproductive system and care for pregnant women. What is an OB/GYN? Obstetrics deals with care during pregnancy, childbirth, and the postpartum period. Gynaecology involves care for reproductive health, the functions and diseases related to women. You can visit thomsonhospitals.com to make appointments with the best O&G doctors in Malaysia.