Wah, this is quite important especially for first pregnancy, memang kena monitor closely dengan Rh negative, so good on you for asking! Kena jumpa doctor untuk confirm if you need the anti-D injection (rhogum), timing and dosage dia bergantung on your situation, so don't take chances with this one. Best to get proper medical advice from your OB/GYN directly sebab setiap pregnancy berbeza, tapi good thing is doctors here very familiar with Rh negative cases already.