Gestational age, or the age of the baby, is calculated from the first day of the mother’s last menstrual period.Since the exact date of conception is almost never known, the first day of the last menstrual period is used to measure how old the baby is.
One can calculate the age of the baby from the last menstrual period (LMP) – the result of this calculation will provide the gestational age. Importantly, the exact date of conception is almost impossible to know. Typically, the baby will be due 40 weeks after the first day after your last menstrual period. Calculating Time of Conception and Due Date. Our KnowtheGender baby gender test can be performed as early as the 9th week of pregnancy (the person taking the test must be 9 weeks pregnant, with counting commencing from the first day of the last menstrual period). Estimated conception date: This is 266 days (38 weeks) subtracted from the selected pregnancy due date (the average human gestation period per Naegele's Rule). Last period date: This is 14 days prior to conception (assuming ovulation occurred on day 14 of your menstrual cycle). Instructions: Select the month, day, and year your baby is due, and then click the Calculate Conception Date button. Mouse over the blue question marks for a further explanation of each entry field. More in-depth explanations can be found in the glossary of terms located beneath the calculator. The numbers represent the best case scenario for the probability of pregnancy if you are actively trying to conceive naturally (without any medical intervention). Based on average statistics, this calculator will give you an idea of how age can affect fertility. Includes the probability of pregnancy each cycle, probability of conception over time, risk of miscarriage and chances of chromasomal defects based on maternal age.  In short, why do they differ: 1  Fetal age (from the estimated conception date). 2  Calculating the gestational age from the conception date is more accurate. 3  How far along you are in your pregnancy (from the first day of the last menstrual cycle). 4  Calculating the gestational age from the from the first day of the last menstrual cycle is more practical. - Sperm lives for about 2 days. Because of the uncertainly of the exact conception date, obstetricians prefer to calculate the fetal age from the first day of the last menstrual cycle. In short, why do they differ: 1  Fetal age (from the estimated conception date). 2  Calculating the gestational age from the conception date is more accurate. 3  It is the preferred way of the medical textbooks. 4  How far along you are in your pregnancy (from the first day of the last menstrual cycle). - Sperm lives for about 2 days. Because of the uncertainly of the exact conception date, obstetricians prefer to calculate the fetal age from the first day of the last menstrual cycle. 1 Calculating the gestational age from the conception date is more accurate. 2  It is the preferred way of the medical textbooks. 3  How far along you are in your pregnancy (from the first day of the last menstrual cycle). 4  Calculating the gestational age from the from the first day of the last menstrual cycle is more practical. - Sperm lives for about 2 days. Because of the uncertainly of the exact conception date, obstetricians prefer to calculate the fetal age from the first day of the last menstrual cycle. Use the Pregnancy Calculator to: 1  Determine the due date. 2  Calculate the likely conception date. 3  Calculate the end of the first and second trimesters. 4  Find out for how many weeks have you been pregnant. 5  Estimate the fetal age. 6  Calculate how many weeks you will be pregnant on a given date. - Sperm lives for about 2 days. Because of the uncertainly of the exact conception date, obstetricians prefer to calculate the fetal age from the first day of the last menstrual cycle. Finding out when your baby was conceived is easy using our calculator. Just enter the date of the first day of your last menstrual period (LMP) to generate a table that shows the probable dates of conception, based on the average length of your menstrual cycle. Conception, due dates and gender. Ovulation (and therefore, conception) occurs 14 days before your period is due. If you have a 28-day menstrual cycle — which is assumed by many healthcare providers — you most likely ovulated on day 14. Calculating Conception. Gestational age, or the age of the baby, is calculated from the first day of the mother’s last menstrual period. Since the exact date of conception is almost never known, the first day of the last menstrual period is used to measure how old the baby is. Use our Pregnancy Calculator to calculate these dates for you. The baby can be measured as early as 5 or 6 weeks after the mother’s last menstrual period. Measuring the baby using ultrasound is most accurate in early pregnancy. It becomes less accurate later in pregnancy. The best time to estimate gestational age using ultrasound is between the 8th and 18th weeks of pregnancy.
https://www.easy-dna.com/gender-prediction-test/calculate-conception-due-date/ http://www.free-online-calculator-use.com/reverse-due-date-calculator.html http://www.countdowntopregnancy.com/tools/age_fertility_calculator.php http://www.c-point.com/JavaScript/calculators/pregnancy_calculator.php http://www.c-point.com/JavaScript/calculators/pregnancy_calculator.php http://www.c-point.com/JavaScript/calculators/pregnancy_calculator.php http://www.c-point.com/JavaScript/calculators/pregnancy_calculator.php http://www.pregnancyandbaby.com/tools/articles/942801/conception-date-calculator http://americanpregnancy.org/while-pregnant/calculating-conception-due-date/
How to calculate age at conception