Since the mission of Yaz is to (a) prevent ovulation and (b) make changes in your cervical and uterine lining that make it less friendly to sperm, I would think it would be more dangerous when you start your period earlier rather than later. In other words, because you go more days without a pill, there is a greater chance of ovulation.
Most women who have "normal" cycles and are not on birth control will ovulate about 14 days before their period starts. And then you have to add on the time that an egg can survive and the time that sperm can survive. It would look a little like this for a "normal" 28-day period WITH ovulation:
Day 1: period starts
Days 10-13 since sperm can live up to three days, fertile window starts about here
Day 13-14: ovulation occurs
Day 14-15: since an egg can live 24-36 hours, fertile window extends to about here
Day 27 or 28: new period begins, becoming Day 1.
But again, that is without hormonal birth control.
In order for you to become pregnant, you would have had to ovulate, you would have had to had unprotected sex during the fertile window, your uterine lining would have had to build up enough to support a fertilized egg, and that egg would have had to implant.
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Kclearh20,
Since the mission of Yaz is to (a) prevent ovulation and (b) make changes in your cervical and uterine lining that make it less friendly to sperm, I would think it would be more dangerous when you start your period earlier rather than later. In other words, because you go more days without a pill, there is a greater chance of ovulation.
Most women who have "normal" cycles and are not on birth control will ovulate about 14 days before their period starts. And then you have to add on the time that an egg can survive and the time that sperm can survive. It would look a little like this for a "normal" 28-day period WITH ovulation:
Day 1: period starts
Days 10-13 since sperm can live up to three days, fertile window starts about here
Day 13-14: ovulation occurs
Day 14-15: since an egg can live 24-36 hours, fertile window extends to about here
Day 27 or 28: new period begins, becoming Day 1.
But again, that is without hormonal birth control.
In order for you to become pregnant, you would have had to ovulate, you would have had to had unprotected sex during the fertile window, your uterine lining would have had to build up enough to support a fertilized egg, and that egg would have had to implant.
What did you decide about the Plan B?
April 6, 2010 - 8:31amThis Comment
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