The symptoms and discomforts of pregnancy are those presentations and conditions that result from pregnancy but do not significantly interfere with activities of daily living or pose a threat to the health of the mother or baby. Sometimes a symptom that is considered a discomfort can be considered a complication when it is more severe.
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 male and female gametes usually occurs following the act of sexual intercourse.
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.
Withdrawal of the penis prior to ejaculation and periodic abstinence does not prevent pregnancy or spread of sexually transmitted diseases.
Here you can read more about several forms of contraceptives.Sometimes, timing may also use the fertilization age which is the age of the embryo.Naegele's rule is a standard way of calculating the due date for a pregnancy when assuming a gestational age of 280 days at childbirth.The terms preterm and postterm have largely replaced earlier terms of premature and postmature.Preterm and postterm are defined above, whereas premature and postmature have historical meaning and relate more to the infant's size and state of development rather than to the stage of pregnancy.A woman who is (or has been only) pregnant for the first time is referred to as a primigravida, Therefore, during a second pregnancy a woman would be described as gravida 2, para 1 and upon live delivery as gravida 2, para 2.