Mirena (Hormonal Contraceptive) : How does it Act ?

 Dr Deepika Tiwari, Gynecologist, Gurgaon 9911821669
www.gurgaongynae.in
http://www.drdeepikatiwari.blogspot.com/
http://www.gurgaongynecologist.webs.com/

Mirena acts by

• Supplements the endometrial action of progestins to foreign body reaction
• Endometrium becomes decidualized, with atrophy of glands
• Inhibition of implantation
• Inhibition of sperm capacitation and survival

The Ovarian functions are NOT disturbed; the cycles remain ovulatory in 85 percent of patients, regardless of bleeding pattern.

Few Shortcomings of Mirena include; irregular bleeding and scanty menses. Amenorrhoea may occur in up to 50 % of patients.

Mirena: Intra-uterine Contraceptive Device (IUCD)

Dr Deepika Tiwari, Gynecologist, Gurgaon 9911821669
www.gurgaongynae.in
http://www.drdeepikatiwari.blogspot.com/
http://www.gurgaongynecologist.webs.com/

Mirena is a longer acting hormone releasing device. It has a T shaped polyethylene frame with a steroid reservoir, containing Levonorgesterol.
This device mainly acts by releasing levonorgesterol into the uterine cavity, and effects are due to local progesterone action. It can produce contraceptive action for up to 5 years.
Pearl Index after 5 years is 0.09/ 100 women year.
Health Benefits of Mirena

• Reduction of blood loss
• Reduction of pain and dysmenorrhoea in Endometriosis, and fibroids.
• Do not influence lactation, or foetal growth
• Prevention and treatment of Endometrial hyperplasia

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