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unprotected sex on the 4th and 6th day on yaz?

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I am taking Yaz for the first time, I started taking it on the 1st day of my period & I am now only taking my 7th pill. However, I had unprotected sec on the 4th and 6th day. What is the possibility of getting pregnant?

I thought that fertile days start on the 14th day? Then why are we advised to use a back-up method for the 1st 7 days of taking the pill, doesn't this count as the safe days, since it's still within the 14 days after the menstrual cycle?

By the way, my period is regular, with my shortest cycle at 26 days, and the longest cycle at 31 days (as observed from a 6-month time period). If this is the case, when does my ovulation start, and was I safe when I had unprotected safe during the 4th & 6th days?

Hope you can help. Thanks!

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replied August 6th, 2012
Birth Control Answer A37748
Welcome to ehealthforum,
For a regular menstrual cycle of 28-30 days, the usual fertile days would lie between days 8-18 taking day 1 as first day of bleeding with ovulation occurring around 12th-14th day. If fertile mucus had been present at time of intercourse, sperms can stay alive for 5-7 days and fertilize the egg upon ovulation. After ovulation, egg has only 24-48 hours to get fertilized. Hence you are recommended to use additional protection if having intercourse during the first few weeks of getting started with birth control pills. Continue to take the pills at scheduled time daily. Wait and watch for your periods/withdrawal bleeding. Look out for development of any other new symptoms if pregnancy is suspected. If periods do not start within 10 days of expected period dates, or if you get abnormal periods, or if you suspect chances of pregnancy, consider visiting your doctor/gynecologist at the earliest for thorough examination (to confirm pregnancy related changes/signs in body) and blood/serum HCG level test (to confirm/rule out pregnancy accurately). Stop the birth control pill use if pregnancy is suspected, or if pregnancy gets confirmed.
Take care.

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