Dating and viability
As the word is used in United States constitutional law since Roe v.Wade, viability is the potential of the fetus to survive outside the uterus after birth, natural or induced, when supported by up-to-date medicine.
It defines "born alive" as "the complete expulsion or extraction from his or her mother of that member, at any stage of development, who after such expulsion or extraction breathes or has a beating heart, pulsation of the umbilical cord, or definite movement of voluntary muscles" in practice doctors and nurses are advised not to resuscitate such persons with gestational age of 22 weeks or less, under 400 g weight, with anencephaly, or with a confirmed diagnosis of trisomy 13 or 18.Women who have previously had a miscarriage may also find an early scan reassuring.We will perform the scan through your abdomen (tummy) but sometimes it is necessary to perform an internal (transvaginal) scan to get better pictures.A baby's chances for survival increases 3-4% per day between 23 and 24 weeks of gestation and about 2-3% per day between 24 and 26 weeks of gestation.After 26 weeks the rate of survival increases at a much slower rate because survival is high already. Wade (1973) that viability (i.e., the "interim point at which the fetus becomes ... Government enacted the Born-Alive Infants Protection Act.A clear explanation of the procedure and what has been found during the scan will be given to you by your sonographer throughout the scan.
Scans at this stage in pregnancy are a useful test for women experiencing bleeding or pain.
As a consequence, there is, at the present time, no worldwide, uniform gestational age that defines viability.
According to studies between 20, 20 to 35 percent of babies born at 23 weeks of gestation survive, while 50 to 70 percent of babies born at 24 to 25 weeks, and more than 90 percent born at 26 to 27 weeks, survive.
The next few months will be an exciting time as you feel your baby grow and make plans for the birth but we also understand that it can be a worrying time and that you will naturally be concerned that your pregnancy is developing normally.
An ultrasound scan can provide you with the reassurance you need at this time and at Baby Scan Now we provide convenient and affordable pregnancy scans at a selection of locations.
There are several factors that affect the chance of survival of the baby. The baby's gestational age (number of completed weeks of pregnancy) at the time of birth and the baby's weight (also a measure of growth) influence whether the baby will survive. For a given weight, Black babies have a slightly better chance of survival than White, while most other races have a rate between the two.