Pregnancy Conception Calculator
The Pregnancy Conception Calculator estimates the date of conception based on the expected due date of the pregnancy, last period date, or ultrasound date. The date of conception is the day on which a person's baby is conceived. The calculator also estimates a possible range of days during which sexual intercourse might have led to conception based on sperm being viable for 3-5 days within a woman's body.
Pregnancy Conception Calculator
Calculate when you likely conceived based on different methods
Calculation Results
When Did I Conceive?
Many women ask this question when trying to figure out the exact day their pregnancy began. Often, gestational age, or the age of the baby, is calculated from the first day of the mother's last menstrual period. Biologically, the baby was not conceived until ovulation and the fertilization of the egg, which usually happens at least 10 days after the first day of the mother's last menstrual period.
Last Menstrual Period
Conception usually occurs around 11-21 days after the first day of the last period of a woman who has a regular period. The estimation of conception date is based on this, but is rarely ever exact since it is difficult to know exactly when ovulation occurs.
Due Date
An estimated due date, usually based on a sonogram, is typically obtained from a healthcare provider during a prenatal visit. Based on this due date, a range of possible conception dates can be calculated.
Ultrasound
An ultrasound uses sound waves to create images of internal body structures. An obstetric ultrasound can provide information about the health of the mother and embryo/fetus, as well as the overall progress and timing of the pregnancy.
Fertilization, Conception, and Pregnancy
Fertilization occurs when the sperm and the egg combine in the fallopian tube, producing a fertilized egg. Conception refers to the process of becoming pregnant, which scientifically involves both fertilization as well as implantation into the wall of the uterus.
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