Download Basic Science in Obstetrics and Gynaecology by Phillip Bennett BSc PhD MD FRCOG, Catherine Williamson PDF

By Phillip Bennett BSc PhD MD FRCOG, Catherine Williamson BSc MD FRCP

A textbook protecting the elemental sciences correct to obstetrics and gynaecology at a degree appropriate for medical professionals specialising within the box . The chapters fit the syllabus of the expert united kingdom examination – the MRCOG half 1

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Sample text

Continued growth of the cytotrophoblast leads to its distal extension into the region of decidual attachment and, at the same time, a mesenchymal core appears within the villous stems, this being formed by a distal extension of the extra­ embryonic mesenchyme. 17 • Diagrammatic representation of (A) formation of primary trophoblastic cell mass and (B) the differentiation of this into the cytotrophoblast and syncytiotrophoblast. 18 • Diagrammatic representation of the development of the placenta during the first 21 days of gestation.

26 Early embryogenesis: fertilization, . transportation and implantation . . . . . . 27 Early development of the embryo . . . . . 29 Organogenesis . . . . . . . . . . . . . 30 Development of the genital organs . . . . . 36 Development of the placenta . . . . . . . 40 Placental bed . . . . . . . . . . . . . 44 Development of membranes and formation of amniotic fluid . . . . . . . . 44 Membranes . . . . . . . . . .

It is possible to aspirate viable sperm from the pouch of Douglas within 30 min of artificial insemination in the upper vagina. Because the ovum is temporarily held up at the ampulla, the majority of fertilizations occur at that site. Experimental work in which the fallopian tubes have been cut into sections after insemination have defined the section of the tubes in which most newly fertilized ova are found. Capacitation is an imprecise term coined to explain the concept of some indeterminate change, which is said to occur to the sperm during the first 6 h in the female genital tract, and without which fertilization was thought to be impossible.

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