I don't have any personal knowledge- but I'll share a synchronicity.
Late last night, while the moon was in Sag moving through my 4th house. I couldn't sleep because I was thinking about babies. I got up to pee, and on the way back I came across an old book called "conscious conception"-
i opened up to random pages and found a section on astrology. The author wrote that for each of her children's birth, when she went into labor, the Moon was in Sagittarius. I can't see how this could provide any correlation to your great question Steve.. but felt called to share this.
Jeannine Parvati Baker is the author of that book. Im discovering has made an amazing contribution to the return of fertility awareness. And amongst many things, also worked closely with astrology. She may be a resource to check out. anyone know her exact birthtime?
And I'll throw out a fun hunch here- she herself has Juptier in Aquarius in the 8th squaring her nodes. Sn Libra 5th, NN aries 11th. Jupiter as ruler of Sag where the Moon was, is in the 8th... I wouldn't be surprised if the answer includes those planets...