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23 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Gravidity |
Number of times woman has been pregnant |
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Parity |
Number of times woman given birth to foetus >24 weeks GA (Live/Still) |
GA - Gestational Age |
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1 G⬇1P⬇2 2 G⬇2P⬇0 |
1 Twins 2 2 x miscarriage |
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Nulliparous (nullip) |
Not previously carried a pregnancy to 24 wks |
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Grand multiparity (grand multip) |
4+ pregnancies to 24 wks |
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How is Delivery Date estimated? (EDD) |
Last period 2 weeks before ovulation That date is likely to be remembered. EDD is 40 wks on |
Human development is 38 wks Pregnancy calculated as 40 wks |
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Key Phases of Development (4) |
Fertilisation Pre-embryo Embryo Foetus |
FPEF |
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Before fertilisation (2) |
Capacitation Activation |
CA |
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Capacitation |
Post-ejaculation in f genital tract Interacts with mucosa 7 hours Removes glycoproteins and sterol from sperm membrane Biochemical change only Reversible on exposure to prostatic secretions |
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Activation |
Occurs later in uterine tubes Acrosome reaction Close to oocyte Releases hydrolytic enzymes Irreversible fusion |
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Polyspermy |
More than 1 sperm fertilises the ovum Inviable |
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How polyspermy is prevented (3) |
Bare lost Fast block Slow block |
200 million sperm per ml of ejaculate 200 make it to ampulla of uterine tube. 2-3s after fusion, ELECTRIC shock 10-60s after fusion, oocyte secretes lysosomes. Cortical reaction (WALL) Zona reaction (Structural CHANGE to Zona pellucida) |
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Fertilisation window - 6 days! |
Sperm survive 5 days. Most fertile 1-2 days before and day of ovulation |
Frequency of coitus affecting probability of fertilisation Daily - 37% Every 2 days - 33% Once - 15% |
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Process of fertilisation (5 ordered) Result of sperm entry (5) |
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Polar bodies |
Ensures oocyte stays haploid until pronuclei combine |
Form from uneven cell division in meiosis |
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Result of sperm entry (5) |
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Result of sperm entry |
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Microdeletion on chromosome 15 Father Mother |
Prader-Willi syndrome Angelman's syndrome |
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Fertilisation key points (5/6) |
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Pre-embryo |
Wks 1-2 Pre-implantation Cell division period |
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Embryo |
Wks 3-8 Organogenesis |
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Foetus |
Wks 9-38 Growth |
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Key Phases of Development |
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