I highly doubt that the terms came from men. My late grandmother, an OB-GYN in the Soviet Union, habitually used the then-accepted term "old primigravida" to refer to women giving birth for the first time at age 25+. Most OB-GYNs in the Soviet Union were women. Just because during the same period of time a lot, if not a majority, of OB-GYNS in the USA were men does not mean that the terms came from men.