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During pregnancy, the enlarged abdomen and gravid uterus place additional strain on lumbar muscles and shift the pregnant woman's center of gravity. These postural compensations culminate in an increased load on both lumbar spinal musculature and the sacroiliac ligaments, manifesting as low back pain and/or pelvic girdle pain. [ 14 ]
Histopathology of placenta with increased syncytial knotting of chorionic villi, with two knots pointed out. The following characteristics of placentas have been said to be associated with placental insufficiency, however all of them occur in normal healthy placentas and full term healthy births, so none of them can be used to accurately diagnose placental insufficiency: [citation needed]
Illustration of fundal height at various points during pregnancy. Some degree of weight gain is expected during pregnancy. The enlarging uterus, growing fetus, placenta, amniotic fluid, normal increase in body fat, and increase in water retention all contribute weight gain during pregnancy. The amount of weight gain can vary from 5 pounds (2.3 ...
The placenta (pl.: placentas or placentae) is a temporary embryonic and later fetal organ that begins developing from the blastocyst shortly after implantation.It plays critical roles in facilitating nutrient, gas and waste exchange between the physically separate maternal and fetal circulations, and is an important endocrine organ, producing hormones that regulate both maternal and fetal ...
The internal pressure of the amniotic fluid causes the amnion to be passively attached to the chorion. [4] The chorion functions to separate the amnion from the maternal decidua and uterus. [4] The placenta develops from the chorion of the embryo and the uterine tissue of the mother.
The decidua is the modified mucosal lining of the uterus (that is, modified endometrium) that forms every month, in preparation for pregnancy. It is shed off each month when there is no fertilized egg to support. [1] The decidua is under the influence of progesterone. Endometrial cells become highly characteristic.
It is a thin but tough transparent pair of membranes that hold a developing embryo (and later fetus) until shortly before birth. The inner of these membranes, the amnion, encloses the amniotic cavity, containing the amniotic fluid and the embryo. The outer membrane, the chorion, contains the amnion and is part of the placenta.
The apical surface of the uterine epithelial cells is covered with microvilli that are under hormonal control and vary in length and number with the oestrous cycle and during pregnancy. A hormonally dependent glycocalyx is found outside the microvilli [ 2 ] while the center of the microvilli consists of an actin filament core which is embedded ...