Sam2, why would a malach want to teach an innocent bas yisroel Tiflus in the womb?
To save time and prevent umbrage, I am fully aware of the heteirim to teach women Torah today. However they are heteirim based on an un-ideal condition. In an ideal condition, it’s anashim lilmod, venashim leshmoa. The Taz is lechora being consistent with his views in YD 246 on this.
Maybe they learn Torah for the first 40 days until the gender is determined.