Final answer:
Pemphigoid gestationis generally manifests during pregnancy, but can also occur postpartum. It is a skin condition characterized by blisters and is not related to the herpes virus.
Step-by-step explanation:
Pemphigoid gestationis, also known as herpes gestationis although it's not related to the herpes virus, typically occurs during pregnancy. This autoimmune blistering skin disease usually manifests itself in the second or third trimester, but it can also appear during the postpartum period. The corpus luteum, which is mentioned in a different context of the menstrual cycle and fertility, originates from the ruptured follicle following ovulation.