Term
| smooth membrane enclosing the fetus and amniotic fluid. |
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Definition
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Term
| cellular, outermost extraembryonic membrane, composed of trophoblast lined with mesoderm |
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Definition
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Term
| the outer ________ develops villi, which are vascularized by allantoic vessels and give rise to the placenta, the inner _______ is fused with the amnion except at the placental cord insertion |
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Definition
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Term
| a functional structure within the normal ovary, which formed from cells lining the graafian follicle after ovulation |
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Definition
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Term
| the __________ _______ produces estrogen and progesterone and may become enlarged and appear cystic during early pregnancy |
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Definition
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Term
| ________ is loosely fused with the outer chorionic membrane except at the placental insertion of the umbilical cord where the _______ is contiguous with the membranes surrounding the cord |
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Definition
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Term
| developing individual from implantation to the end of the 9th week |
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Definition
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Term
age of the embroy stated as from day of conception
it is also known as |
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Definition
embryonic age
conception age |
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Term
| length of pregnancy defined to the US as the number of weeks from the first day of the last normal menstrual perion (LNMP) |
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Definition
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Term
| structure lined by chorion that normally implants within the uterine deciduas and contains the developing embryo |
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Definition
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Term
| organ of communication where nutrition and producs of metabolism are interchanged between the fetal and meternal blood systems, forms from the chorion frondosum with a maternal decidual contribution |
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Definition
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Term
| a 40 week pregnancy is divided into three 13 week period from the first day of the LNMP |
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Definition
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Term
1st trimester - week ________
2nd trimester - week ________
3rd trimester - week ________ |
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Definition
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Term
| connecting lifeline between the fetus and the placenta, it contains 2 umbilical arteries, which carry deoxygenated fetal blood and one umbilical vein, which carries oxygenated fetal blood encased in Wharton's jelly |
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Definition
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Term
| a circular structure within the gestational sac seen with U/S between 4 to 10 weeks of gestational age |
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Definition
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Term
| a cavity in which the fetus exists, forms early in gestation, fills with amniotic fluid to protect the fetus |
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Definition
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Term
| the _______ ________ supplies nutrition, facilitates waste removal and is the origin of early hematopoietic stem cells in the embryo, it lies between the chorion and the amnion |
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Definition
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Term
products of conception from fertilization through implantation
the _________ of pregnancy lasts for approximately 12 days after conception, the fertilized ovum resulting from the union of male and female gametes |
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Definition
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Term
surronds the amniotic cavity
the yolk sac is within the ______ __________ |
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Definition
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Term
| a small yellow endocrine structure that develops within a ruptured ovarian follicle and secretes progesterone and estrogen |
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Definition
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Term
| the most accurate measurement of the embryo in the 1st trimester |
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Definition
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Term
| the villi on the maternal side of the placenta or embryo, unites with the chorion to form the placenta |
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Definition
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Term
| the villi surrounding the chorionic sac |
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Definition
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Term
| interface beween the decidua capsularis and the echogenic, highly vascular endometrium |
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Definition
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Term
| time between 6 - 10 weeks of gestation when all major internal & external structures begin to form |
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Definition
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Term
| the hormone secreted by the trophoblastic cells (developing placental cells) of the blastocyst, laboratory test indicates pregnancy when values are elevated |
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Definition
| hCG or human chorionic gonadotropin |
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Term
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Definition
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Term
| length of time calculated from the 1st day of the LNMP to the point at which the pregnancy is being assessed |
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Definition
| menstrual age (gestational age) |
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Term
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Definition
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Term
| 1st site of formation of RBC's that will nourish the embryo |
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Definition
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Term
| formed at 23 days when the primary yolk sac is pinched off by the extra embryonic coelom |
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Definition
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Term
| the umbilical duct connecting the yolk sac with the embryo |
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Definition
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Term
| the fetal trophoblastic tissue, that together with the decidua form the area for maternal and fetal circulation |
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Definition
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Term
| the chorion around the gestation sac on the opposite side of implantation |
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Definition
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Term
| the maternal surface of the placenta |
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Definition
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