At the risk of delving into controversy, I want to note that today is the 36th anniversary of Roe v. Wade, and also Blog for Choice Day.
Reproductive freedom, up to and including safe and legal abortions, is vital to women in science precisely because it allows us to choose how and when to start our families, or even whether to do so at all. At nearly every forum on women in science or women in astronomy I attend, the subject of having children always comes up: when's the best time? what about childcare? can I get maternity leave? how do you balance work and family? These questions are hard enough to answer. It's made slightly easier by having the freedom to choose.