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Date of last update: 10/14/2017.
Forum Name: Gynecology
Question: On Pill, Missed Period, but no sex
|firefly05 - Thu Jun 09, 2005 10:29 pm||
Hi, I just had a question that I was wondering if anyone could help with. I have been on the pill for about a year and a half, and my periods are very regular. However, this month I have missed my period even though I did not miss any pills. Also, the last time I had sex was the day before the beginning of my last period.
So I am wondering if I may be pregnant, even though I have not had sex during this pack of pills. What could be causing this?
Any help is greatly appreciated.
|Dr. Tamer Fouad - Wed Jan 11, 2006 7:44 am||
The causes of absence of menstruation for less than 3 cycles are similar to the causes of amenorrhea (cessation of menses), with the exception of anatomic or chromosomal etiologies. Hypothalamic, pituitary, or ovarian hormonal dysfunction is less severe or of shorter duration than with amenorrhea.
Causes include pregnancy, ectopic pregnancy (especially if you have had a tubal ligation), use of hormonal birth control methods (such as birth control pills or hormonal injections or implants), recently stopping birth control pills or breast-feeding. Other causes such as rapid weight loss, obesity, excessive exercise or participation in endurance sports, menopause, severe stress or lifestyle change, use of certain medications and hormone imbalance. Other, more serious causes of missed periods include tumors, pituitary disorders, and other glandular problems involving the ovaries, thyroid, or adrenal glands. These problems are rare.
Usually if the period is late and the woman is not pregnant, the cause is hormonal--she is not ovulating regularly for some reason. Weight changes and stress levels can disrupt the menstrual cycle; so can being peri-menopausal, taking some medications, and engaging in heavy exercise.
Its normal to experience missed periods while taking contraceptive pills; however, you are recommended to get a pregnancy test.
After excluding pregnancy, the usual recommendation is if you miss more than three cycles or have any symptoms that are worrying you, you should see your doctor to check for the cause of the problem.
1. Jonathan S. Berek: Novak's Gynecology, 13th ed. Lippincott Williams & Wilkins, 2002.
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