Which of the following is NOT correct concerning the early history of contraception and the birth control pill?单项选择题

A

Volunteers in America participated in early clinical trials during the 1950’s

B

In the early 1900’s, contraception was illegal in America

C

Scientists knew at the time that progesterone would block ovulation, but progesterone initially was difficult to purify or synthesize.

D

The scientist Gregory Pincus, funded by Margaret Sanger and the wealthy heiress Kathleen McCormick, began to formulate early versions of what we now refer to as “the pill.”

E

Margaret Sanger started the first birth control clinic in 1916, and in 1942 formed the organization Planned Parenthood.

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