Is it true that at being at a certain depth underwater can affect a woman's reproductive system?

close quarters, yeah thats a reason, no period, that would be a blessing. No it wouldn't have an effect. Pressure does change on a sub, but its no different that going from sea level to 5,000ft over a period of a day. We wouldn't have an OBGYN onboard to take care of feminine needs, nor does the sanitary system handle feminine care products. (it would break the pumps, damn tampons)