
Calcular.tools
Ovulation Calculator
Estimate your most probable ovulation and fertile window based on your last menstrual period. This calculator should not be used as a form of birth control.
Ovulation and Conception
Ovulation in humans is the process by which ovarian follicles rupture and release one or more mature eggs from the ovaries. On average, ovulation occurs within the 4 days before or after the midpoint of a woman's menstrual cycle (14 days before the start of a woman's next menstrual period).
Day 10-18 of the menstrual cycle (on average) is the most fertile phase of the menstrual cycle. This is important when trying to conceive because fertilization of the egg can only occur for 12-24 hours after release during part of the luteal phase, when a mature egg travels through the fallopian tubes towards the uterus. Since sperm can survive inside a woman's body for up to five days, regular sex five days before and on the day of ovulation can improve the likelihood of conception. If fertilized, the egg will implant in the uterus 6-12 days later. Otherwise, menstruation occurs, and blood and mucosal tissue from the inner lining of the uterus is expelled.
Ovulation Prediction
Many people would like to predict their ovulation date, mostly to increase their chances of getting pregnant. The following are a few common methods for doing so.
Tracking Menstrual Cycles
This ovulation calculator uses the method of tracking menstrual cycles in order to predict when ovulation occurs. Since day 10-18 of the menstrual cycle is typically the most fertile phase of the menstrual cycle, women with regular cycles can fairly easily determine when they are ovulating and most likely to conceive.
Menstrual cycles vary between women however, and a person without a 28-day menstrual cycle may need to track their menstrual cycle to more accurately determine when ovulation might occur. The first day of the menstrual cycle is the day that bleeding starts, and it ends the day that bleeding starts for the next cycle.