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Fetal position (British English: also foetal) is the positioning of the body of a prenatal fetus as it develops. In this position, the back is curved, the head is bowed, and the limbs are bent and drawn up to the torso. A compact position is typical for fetuses. Many newborn mammals, especially rodents, remain in a fetal position well after birth.
The National Health Service (NHS) advises pregnant individuals to sleep on their side, either the left or right, for optimal safety during pregnancy. [36] Research indicates that beyond the 28th week, assuming a supine (back) sleeping position can result in a twofold increase in the risk of stillbirth. [36]
In obstetrics, position is the orientation of the fetus in the womb, identified by the location of the presenting part of the fetus relative to the pelvis of the mother. Conventionally, it is the position assumed by the fetus before the process of birth, as the fetus assumes various positions and postures during the course of childbirth .
End of second trimester + 2 weeks (26 weeks of pregnancy) The fetus is genetically different from its mother and can therefore be viewed as an unusually successful allograft . [ 53 ] The main reason for this success is increased immune tolerance during pregnancy, [ 54 ] which prevents the mother's body from mounting an immune system response ...
If you're experiencing the first symptoms of pregnancy or wondering when pregnancy symptoms start, you can look forward to week 13, or the start of the second trimester, when early pregnancy ...
During pregnancy the plasma volume increases by 40-50% and the red blood cell volume increases only by 20–30%. [22] These changes occur mostly in the second trimester and prior to 32 weeks gestation. [24] Due to dilution, the net result is a decrease in hematocrit or hemoglobin, which are measures of red blood cell concentration.
This position is convenient for the caregiver because it permits them more access to the perineum. The position has been largely popular in the US and other Western countries over the last two centuries, though cross-culturally and historically, it is very rare (about 18%) for people to assume a prone or dorsal position during childbirth.
The sleeping position is the body configuration assumed by a person during or prior to sleeping. Six basic sleeping positions have been identified: [dubious – discuss] Fetus (41%) – curling up in a fetal position. This was the most common position, and is especially popular with women. Log (15%) – lying on one's side with the arms down ...