Final answer:
The client should receive RhoGAM at 28 weeks' gestation and again within 72 hours after delivery.
Step-by-step explanation:
The client should receive RhoGAM at 28 weeks' gestation and again within 72 hours after delivery. RhoGAM is administered to Rh pregnant individuals during weeks 26-28 of pregnancy to prevent Rh antibodies from developing. It is then given again within 72 hours following birth to further prevent the development of Rh antibodies.