Contraception – mechanisms

 

Inhibit Ovulation & thickens cervical mucus

  • Injectable contraceptives (medroxyprogesterone)
  • Implantable contraceptives (etonogesterel)

Prevents Endometrial Proliferation (+ thickens cervical mucus)

  • Intrauterine System (Levonogesterel)

Inhibits ovulation

  • Combined Oral Contraception

Thickens Cervical Mucus

  • Progesterone Only Pil

Decreases Sperm survival and motility

  • Intrauterince contraceptive device

See:

Quick Start Contraception

Emergency Contraception

Method Specific:

  • Progesterone Only Implant
  • Intrauterine System
  • Interuterine Device
  • Combined Hormonal Contraception

NOTE: IF A WOMEN HAS HAD BREAST CANCER SHE CAN ONLY USE BARRIER OR THE INTERUTERINE DEVICE – no hormones at all!

If she’s had a DVT or she’s Factor V Leiden then she can have the POP or the Mirena

Combined Oral Contraceptive

  • Increased clotting tendency
  • Decreased risk of endometrial cancer
  • Decreased risk of ovarian cancer
  • Possible increased risk of breast cancer
  • Loss of labido can occur although not common
  • Migraine is a known adverse effect
  • Depression is known adverse effect
  • Increased skin pigmentation (chloasma) can occur
  • Weight gain occurs in some