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A member asked:
Are chances high of pregnancy before period (week) before ?
A doctor has provided 1 answer
Low probability: Unlikely but not impossible. During a 28-day (4-week) cycle (from beginning of one to the beginning of next period) the time of greatest fertility ("fertility window") is during the 2nd and 3rd week (days 7-21) after your period. You are much less likely to become pregnant during the 4th week (the week before your period). (image is from wilcox aj et al. Bmj. 2000; 321(7271): 1259–1262).
Answered 4/8/2014
4.3k views
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