The gestational age should ,therefore, be at least 10 to 12 weeks if fetal heart tone are heard. Determination of Gestational Age by Ultrasound No. Morin L, Lim K. This calculator is not intended to replace the evaluation of a healthcare professional. Epub Mar Professor Bill Ledger Sperm that are stored within the testicles for too long accumulate damage to the DNA and are less fertile.
Sperm can live for a few days and the egg can live about a day, so most experts suggest you try every other day or every day starting about 5 or 6 days before you expect to ovulate, up through the day of ovulation or the next day.
Dating a pregnancy by period or ovulation?
Study of women in the UK comparing a simple calendar method to likelihood of conducting a test on LH surge day Stress, illness, and other things can also affect the timing of ovulation. Studies have shown that to increase your chances of getting pregnant, you should have sex once a day or every 2 days during your fertile days. Please note that the date you enter in the calculator may result in an ovulation date that has already passed. We are looking for women aged 18 to 40 years to take part in a clinical study lasting approximately 1 month.