To determine the date of conception, use an online ovulation calculator found on WebMD or BabyMed. Alternatively, women can identify the last menstrual period that they have had and add 40 weeks to determine due date, wh... More »

www.reference.com Health Women's Health Pregnancy

Using a pregnancy test calculator is easy and simply requires inputting individual data including the date of the woman's last period as well as the typical length of the menstrual cycle, reports WebMD and BabyMed. Pregn... More »

The first step in using any fertility calculator based on ovulation dates is to chart the dates of your last few menstrual periods, according to WebMD. Note the date that you began menstruating on a calendar, and mark it... More »

www.reference.com Health Women's Health

A conception calculator is a simple method of estimating the gestational age of a pregnancy by placing the date of conception at the first day of the mother's last menstrual period, explains BabyMed. It is impossible to ... More »

Using a pregnancy test calculator is easy and simply requires inputting individual data including the date of the woman's last period as well as the typical length of the menstrual cycle, reports WebMD and BabyMed. Pregn... More »

To calculate the date of conception, a woman with regular menstrual periods counts 11 to 21 days from the first day of her last cycle, according to the American Pregnancy Association. Since most women do not know the exa... More »

BabyMed claims that changes to the cervix do not always occur until several weeks or months after a woman becomes pregnant. Accordingly, the cervix does not feel different at four weeks for most women. A cervix normally ... More »