2 stimulates the production of a thick pasty cervical

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2. Stimulates the production of a thick,  pasty cervical mucus. difficult for sperm to penetrate Slide 14 Actions of Progestin in  Contraceptives (con’t) 3. I nhibits capacitation of sperm . Capacitation is an enzyme initiated change  in sperm required before fertilization can  occur. 4. Slows the rate of ovum transport  through the oviduct. 5. Prevents adequate build-up of the  endometrium of the uterus such that  implantation is unlikely. Slide 15 Effectiveness Slightly higher for contraceptive  containing both estrogen and progestin  than for those with progestin  Estrogen/ progestin =  98 -100% Progestin-only =  95-98%
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Slide 16 www.plannedparenthood.org 2/ 15 6/ 16 5/ 21 14/ 29 9/ 16 12/ 25 < 1/ 2* < 1/ 3 < 1/ 8 < 1/ 8 < 1/ 8 4/ 27 15/ 29 A/ B: A =  always used correctly B =   not always  used correctly Slide 17 Risks Estrogen-containing contraceptives increased risk of blood clots, stroke and  heart attack m ajor risk is for women over age 35  or for women under age 35 who smoke Risk may be higher for the patch than  for other delivery forms effect on risk of breast cancer is unclear Slide 18 Risks Progestin-containing contraceptives may increase plasma lipids which has  been associated with increased risk of  cardiovascular disease
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Slide 19 Risks
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