Reply #153: studies on tubal fluid

[LisaLL]

There have been studies where women having their tubes tied near ovulation-at the time of surgery--will have their tubes flushed with fluid and the fluid examined for fertilized eggs. In women using IUDs, no fertilized, normally dividing eggs were found. In women not using contracpetion, half had fertilized eggs found.

Extremely sensitive blood test studies show that there aren't chemical pregnancies occurring with IUDs in place.

Changes that occur in the uterus from IUDs impair sperm function.

Is it a possibility that sometimes an egg could fail to implant from having an IUD, from using breastfeeding for contraception, from pills or depo? Yes, there is a possibility. But evidence has shown the other mechanisms to be present and primary.

(Best resource on this is "Contraceptive Technology 18th Rev edition. Hatcher, et al)