6: Fetal Development Flashcards

1
Q

Fertilization, preembryonic development, embryonic development, or fetal development?
Implantation

A

Preembryonic development

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2
Q

When does quickening occur?

A

Maternal perception of fetal movement typically begins in the second trimester at around 16 to 20 weeks of gestation and occurs earlier in parous women than nulliparous women. The mother’s first perception of fetal movement, termed “quickening,” is often described as a gentle flutter.

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3
Q

Fertilization, preembryonic development, embryonic development, or fetal development?
Meiosis II

A

Fertilization

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4
Q

Chorion develops from _____?

A

Trophoblast

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5
Q

Fertilization, preembryonic development, embryonic development, or fetal development?
Block to polyspermy

A

Fertilization

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6
Q

Fertilization, preembryonic development, embryonic development, or fetal development?
Formation of zygote

A

Fertilization

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7
Q

Trophoblast adheres to endometrium.

A

Implantation II

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8
Q

What forms between chorionic villi and basal layer of endometrium?

A

Decidua basalis

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9
Q

When does the blastocyst reach the uterus?

A

Day 6 of cycle

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10
Q

T/F The placenta prevents mixing of maternal and embryonic blood.

A

True

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11
Q

Human chorionic gonadotropin (hCG) is secreted by trophoblast, maintains corpus luteum.

A

Implantation IV

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12
Q

Where are lacunae?

A

Functional layer of endometrium.

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13
Q

When is the fetal heartbeat seen/heard?

A

US: 6 weeks
Doppler: 10-12 weeks
Fetoscope: 17-20 weeks

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14
Q

Fertilization, preembryonic development, embryonic development, or fetal development?
Formation of embryonic membranes

A

Embryonic development

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15
Q

When is the placenta functional?

A

By 3rd month

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16
Q

Fertilization, preembryonic development, embryonic development, or fetal development?
Acrosomal reaction

A

Fertilization

17
Q

Trophoblast forms two layers.

A

Implantation III

18
Q

The placenta forms between what?

A

Placenta forms between chorionic villi and decidua basalis.

19
Q

Fertilization, preembryonic development, embryonic development, or fetal development?
Formation of blastocyst

A

Preembryonic development

20
Q

What are the 2 layers of the trophoblast?

A
  1. Cytotrophoblast: inner layer, maintains cell boundary.

2. Syncytiotrophoblast: outer layer, invades endometrium.

21
Q

Blastocyst reaches uterus on day 6 of cycle.

A

Implantation I

22
Q

Fertilization, preembryonic development, embryonic development, or fetal development?
Cleavage reactions

A

Preembryonic development

23
Q

Trophoblast releases digestive enzymes.

A

Implantation II

24
Q

Fertilization, preembryonic development, embryonic development, or fetal development?
Gastrulation

A

Embryonic development

25
Q

What secretes hCG?

A

Trophoblast

26
Q

What hormones are secreted by the placenta?

A
Progesterone
Estrogens
Human placental lactogen
Human chorionic thyrotropin
Relaxin
27
Q

Fertilization, preembryonic development, embryonic development, or fetal development?
Development of systemic structures.

A

Fetal development

28
Q

Fertilization, preembryonic development, embryonic development, or fetal development?
Capacitation of sperm.

A

Fertilization

29
Q

Fertilization, preembryonic development, embryonic development, or fetal development?
Organogenesis

A

Embryonic development