Pregnant after 4 months dating
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.Twins and other multiple births are counted as one pregnancy and birth.
In-progress pregnancies, abortions, miscarriages and/ or stillbirths account for parity values being less than the gravida number.
Through an interplay of hormones that includes follicle stimulating hormone that stimulates folliculogenesis and oogenesis creates a mature egg cell, the female gamete.
Fertilization is the event where the egg cell fuses with the male gamete, spermatozoon.
Fertilization can also occur by assisted reproductive technology such as artificial insemination and in vitro fertilisation.
Fertilization (conception) is sometimes used as the initiation of pregnancy, with the derived age being termed fertilization age.