Dating of pregnancy updating fascia
Furthermore, actual childbirth has only a certain probability of occurring within the limits of the estimated due date.
A study of singleton live births came to the result that childbirth has a standard deviation of 14 days when gestational age is estimated by first trimester ultrasound, and 16 days when estimated directly by last menstrual period.
After the point of fertilization, the fused product of the female and male gamete is referred to as a zygote or fertilized egg.
The fusion of female and male gametes usually occurs following the act of sexual intercourse.
We are a member of the Online Dating Association (ODA).The rule estimates the expected date of delivery (EDD) by adding a year, subtracting three months, and adding seven days to the origin of gestational age.Alternatively there are mobile apps, which essentially always give consistent estimations compared to each other and correct for leap year, while pregnancy wheels made of paper can differ from each other by 7 days and generally do not correct for leap year.Pregnancy rates for sexual intercourse are highest during the menstrual cycle time from some 5 days before until 1 to 2 days after ovulation.Fertilization can also occur by assisted reproductive technology such as artificial insemination and in vitro fertilisation.