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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 ...
Pelvimetry is the measurement of the female pelvis. [1] It can theoretically identify cephalo-pelvic disproportion, which is when the capacity of the pelvis is inadequate to allow the fetus to negotiate the birth canal.
The form of the human placenta is generally classified as a discoid placenta. Within this, the cotyledons are the approximately 15-25 separations of the decidua basalis of the placenta, separated by placental septa. [3] Each cotyledon consists of a main stem of a chorionic villus as well as its branches and sub-branches. [3]
A change in the composition of the microbiota in the placenta is associated with excess gestational weight gain, and pre-term birth. [10] The placental microbiota varies between low birth weight infants and those infants with normal birth weights. [13]
The part of the ovary where the funiculus attaches is referred to as the placenta. In botany, the term placentation most commonly refers to the arrangement of ovules inside an ovary. Placentation types include: Basal: The placenta is found in mono to multi carpellary, syncarpous ovary. Usually a single ovule is attached at the base (bottom).
Fundal height, or McDonald's rule, is a measure of the size of the uterus used to assess fetal growth and development during pregnancy. It is measured from the top of ...
The width and length of the placenta folds are positively related and increase as gestation progresses. The width of the placental folds decreases until day 85 of gestation. [citation needed] From here, the width increases with gestation and is at its largest around day 105. The rate at which these folds increase is negatively related to fetus ...
The uterine height is greater than the normal for the particular day of puerperium. Normal puerperal uterus may be displaced by a full bladder or a loaded rectum. It feels boggy and softer upon palpation. The presence of features responsible for subinvolution may be evident.