Okay, definition time. Yay!

Birth control: various methods of preventing or attempting to prevent births, including all the following:

Abstinence: purposely not having sexual intercourse

Sterilization: removal or deactiviation of primary sexual organs

Rhythm: calculating, and avoiding intercourse during, a woman's monthly period of fertility

Contraception: use of techniques, devices, drugs, etc. to prevent conception (includes condoms, IUD's, "birth control" pills, douching, RU486, etc.)

Abortion: removal of embryo or fetus from the womb

and, in extreme cases (wars, etc.)-- Killing of some or all reproductive adults, usually within a plan of genocide

(Done without consulting a dictionary. Feel free to correct substantive errors.)

Since the term "birth control" has been pretty well spoken for, perhaps Lamaze could be called "birth muscle control" or "birth management".