ANHB2216 Study Guide - Final Guide: Vas Deferens, Vasectomy, Emergency Contraception
3 Jun 2018
School
Course
Professor
Contraception
• Depot
o LH inhibited → ovulation inhibited
o Endometrium less receptive to implantation
o Mucus thickening → sperm entry to cervix inhibited
o Contains progesterone
o Doesn’t affect ovarian function
o Injects every 3 months
o Bleeding is irregular by usually settles to nil
o Moderately long acting → moderately effective
o Risk of hormonal side effects
o Not immediately reversible
• IUDs
o Inserted into uterine cavity
o Simple for doctor/nurse to remove
o Can be inserted under sedation
o Cost effective
o Insertion not comfortable
o Types of IUDs
▪ Progesterone
• Same effect as implant → inhibit LH surge
• Only works sometimes → variable ovarian passage
• Sperm motility inhibited
• Sperm and egg unable to meet
• Sits in uterine cavity
▪ Copper
• Endometrium less receptive to implantation
• Sperm motility inhibited
• Non-hormonal
• Form of emergency contraception
• Hormonal
o Combined pill
▪ Estradiol and progesterone → inhibits FSH and LH
▪ Ovulation and ovarian function inhibited → no follicular
development
▪ Endometrium less receptive to implantation
▪ Mucus thickening
▪ Estradiol affects cardiovascular function
o Progesterone only pill
▪ Ovulation prevented/delayed → inhibits LH
▪ Primary action → endometrium and mucus thickening
▪ Quick to work but also quick to reduce action
▪ Need to be taken at the same time each day
• Implants
o Last 3 years → long acting
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