A Swedish doctor by the name of Thomas Brodin and his colleagues looked at the delivery rates of women who took part collectively in 6,271 in-vitro fertilization cycles.

After refiguring the cycle lengths based on age, what they found was that the length of a menstrual cycle was linked to the likelihood of a successful pregnancy and delivery.

Specifically, when using in-vitro fertilization, the odds of a successful delivery for women with a menstrual cycle of at least 34 days was twice as great when compared with women who had menstrual cycles that were fewer than 26 days.

So, when you visit your fertility doctor, make sure to let him/her know the average length of your menstural cycle. It could be an important factor when determining your pregnancy plan options.