| monthly fecundity r. |
a rate calculated for a group of women undergoing a given treatment for infertility; the total number of pregnancies during a followup period divided by the number of months of followup.
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| month, lunar |
Four calendar weeks (28 days), a measurement of time used in obstetrics. Pregnancy is calculated in terms of 10 lunar months.
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| monthly period |
The time of menstrual flow.
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