
To review:
The type of contraceptive that may be the least controversial when brought to the market. There are four types of contraceptives: one blocks ovulation, one blocks fertilization, one blocks cleavage, and one blocks implantation.
Introduction:
Contraceptives are the methods used to prevent pregnancy. There are many forms of contraceptives such as barriers and hormone-based pills. Barrier contraceptives are the devices that prevent pregnancy by avoiding sperm entering into uterus through physical means. The hormone-based pills provide estradiol and progesterone in synthetic forms. There may be several types of contraceptives that block ovulation, implantation, fertilization, and cleavage.

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Chapter 47 Solutions
Biological Science, Books a la Carte Plus Mastering Biology with Pearson eText -- Access Card Package (6th Edition)
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