Patient :I had sex the last day of active pills for my pack. Three days later (during placebo week) I was diagnosed with strep and started taking amoxicillin. Once I started antibiotics we used a backup method also. Is it possible I'm pregnant? I took a test at the end of my placebo week and it was negative. I was suspicious because I have a very light, almost non-existent period during my sugar pill week. I assumed that would happen though because I had just finished two consecutive packs without taking placebos. Also worth noting, I didn't miss any pills.
Thanks for writing to us.
I have read your case and can understand your concern.
Pregnancy is more likely to occur when intercourse is done in female's ovulation period. Pregnancy is technically only possible during the five days before ovulation through to the day of ovulation.
These six days are the ‘fertile window’ in a woman’s cycle, and reflect the lifespan of sperm (5 days) and the lifespan of the ovum (24 hours).
If a woman has sex six or more days before she ovulates, the chance she will get pregnant is virtually zero. If she has sex five days before she ovulates, her probability of pregnancy is about 10%.
The probability of pregnancy rises steadily until the two days before and including the day of ovulation.
At the end of the ‘fertile window’, the probability of pregnancy declines rapidly and by 12-24 hours after she ovulates, a woman is no longer able to get pregnant during that cycle.
Ovulation happens about two weeks before the next expected period. So if your average menstrual cycle is 28 days, you ovulate around day 14.
As you mentioned you did intercourse in the placebo week (considered as safe period), the pregnancy is least likely to happen during that time. So, your test came out to be negative.
Reduced menstrual flow is a common side-effect of hormonal contraception methods, such as oral contraceptive pills that you are taking as the relatively low estrogen contained in most hormonal contraceptives decreases endometrial growth, so there is relatively little endometrium left to be shed during menstruation.
Hope I could solve your query.
feel free to write back.
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