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Active and quiet periods for the fetus do not correspond to those of the mother; fetuses are most active from 9 a.m. to 2 p.m. and again from 7 p.m. to 4 a.m. [21] During the last four to six weeks before birth, most of the fetus's kicking and jabbing movements occur while it is sleeping lightly. [22]
By 4 months, the average infant sleeps 14 hours a day (including naps), but this amount can vary considerably. [10] By 8 months, most infants continue to wake during the night, though a majority are able to fall back asleep without parental involvement. [2] At 9 months, only a third of infants sleep through the night without waking. [3]
"Views of a Foetus in the Womb", Leonardo da Vinci, ca. 1510–1512 . 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.
The growth rate of an embryo and infant can be reflected as the weight per gestational age, and is often given as the weight put in relation to what would be expected by the gestational age. A baby born within the normal range of weight for that gestational age is known as appropriate for gestational age ( AGA ).
When such premature babies are born, the main causes of mortality are that neither the respiratory system nor the central nervous system are completely differentiated. If given expert postnatal care, some preterm babies weighing less than 500 g (1 lb 2 oz) may survive, and are referred to as extremely low birth weight or immature infants. [21]
One of the most important types of memory is that which stores information contributing to the maternal bond between infant and mother. This form of memory is important for a type of development known as attachment. [2] Fetal memory is thus critical to the survival of the fetus both prenatally (in the womb) and after birth as an infant.
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 chil
If one strikes a pregnant woman or gives her poison in order to procure an abortion, if the fetus is already formed or quickened, especially if it is quickened, he commits homicide. The fetal right to life post-quickening was recognized by the 18th century British legal scholar William Blackstone as a legally protected right "inherent by nature ...