Gestational age is calculated from the first day of the mother’s last menstrual period and not from the date of conception.
The baby can be measured as early as 5 or 6 weeks after the mother’s last menstrual period.
Consult yourphysician to determine the medical implications of any tests you take.
I'm trying to figure out when I will ovulation for many years.
Measuring the baby using ultrasound is most accurate in early pregnancy. The best time to estimate gestational age using ultrasound is between the 8th and 18th weeks of pregnancy.
The most accurate way to determine gestational age is using the first day of the woman’s last menstrual period and confirming this gestational age with the measurement from an ultrasound exam.
al., Fetal crown-rump length: reevaluation of relation to menstrual age (5-18 weeks) with high-resolution real-time US.
Knowing how your ovulation date coincided with the potential for conception also may give you a hint as to the sex of the baby you're carrying.
As part of your antenatal care, your doctor will also offer you a dating scan that will give you a more accurate date for the birth of your baby. Most babies arrive between 37 weeks and 41 weeks of pregnancy, usually within a week on either side of their expected due date.
The Pregnancy Conception Calculator can help to find out the pregnancy conception date based on the pregnancy due date.
A normal pregnancy can last anywhere between 38 and 42 weeks.
Remember that the medical term for “pregnancy due date” is EDD, or estimated date of delivery — which means the date your doctor gives you is only an educated estimate.