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This medication is used to prevent pregnancy. It is often referred to as the "mini-pill" because it does not contain any estrogen. Norethindrone (a form of progestin) is a hormone that prevents pregnancy by making vaginal fluid thicker to help prevent sperm from reaching an egg (fertilization) and changing the lining of the uterus (womb) to prevent attachment of a fertilized egg. It also stops the release of an egg (ovulation) in about half of a woman's menstrual cycles.
While the "mini-pill" is more effective than certain other methods of birth control (such as condoms, cervical cap, diaphragm), it is less effective than combination hormone (estrogen and progestin) birth control because it does not consistently prevent ovulation. It is usually used by women who cannot take estrogen. To reduce the risk of pregnancy, it is very important to take this medication exactly as prescribed.
Amanorrhoea is very common in lactating mother and this may extend up to 9 to 12 months.
So don't worry,
No this not due to micronor,may be due to post operative adhesion.
Thanks for your response.No back pain is not related with micronor.
You are only 5 month after LUCS , this type of problem may remain after a major surgery (intra abdominal).I think these all problems will pass away after few months.
Thin uterus means less proliferation of endometrium or endometrium is thin.The endometrium is thin in lactating mother due to an ovulation and so no period ,it is absolutely normal.