Pregnancy Flashcards

1
Q

Presumptive signs of pregnancy

A

Assumed signs of pregnancy until more concrete signs develop

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2
Q

Probable signs of pregnancy

A

More reliable signs of pregnancy

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3
Q

Dextroversion

A

The uterus moving towards the right during pregnancy.

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4
Q

Lactogenesis

A

The term used to describe milk making.

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5
Q

Lactogenesis 1

A

The differentiation of alveolar epithelial cells into lactocytes that secrete colostrum from around 16 weeks gestation.

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6
Q

Lactogenesis 2

A

Occurs in response to a rise in prolactin hormone and a decrease in pregnancy. It leads to an onset of copious milk secretion which occurs between 32 and 96 hours after birth.

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7
Q

Lactogenesis 3

A

The long-term maintenance of milk production

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8
Q

Lactocytes

A

Milk producing cells

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9
Q

Myoepithelial cells

A

A series of muscle cells in the breast which help to squeeze the milk down the ducts to the openings in the nipple.

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10
Q

Aerola

A

The pigmented area at the centre of the breast

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11
Q

Lobules (alveoli)

A

The mammary glands that produce and secretes milk

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12
Q

Ducts

A

Carry the milk secreted by the lobules through the breast tissue to the opening at the nipple

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13
Q

Prolactin

A

The hormone responsible for milk production

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14
Q

prenatal

A

period between fertilisation and birth

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15
Q

Germinal

A

first 14 days

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16
Q

embryo

A

2-8 weeks

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17
Q

foetus

A

8 weeks to birth

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18
Q

neonate

A

up to 1 month after birth

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19
Q

infant

A

1 month to 2 years

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20
Q

child

A

2 years to puberty

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21
Q

adolescent

A

puberty to 20 years

22
Q

Fertilisation

A

Union of a secondary oocyte and a sperm cell resulting in a zygote

23
Q

Prostoglandins

A

stimulate the lashing movement of the sperm tail for swimming

Cause muscular contractions of the uterus and uterine tubes to aid sperm movement

24
Q

corona radiata

A

layers of cell surrounding the secondary oocyte

25
Q

zona pellucida

A

membrane directly surrounding the oocyte

26
Q

meiosis

A

cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells

27
Q

Female pronucleus

A

when the secondary oocyte completes meiosis II

28
Q

Zygote

A

Fertilised egg cell resulting from the union of a male and female gamete

29
Q

Morula

A

a solid ball of approximately 16 cells, formed at approximately 3 days post-fertilisation

30
Q

Blastocyst

A

The hollow mass that is formed around day 5 when the morula enters the uterus.

31
Q

Endometrium

A

The innermost lining of the uterus.

32
Q

Pluripotent stem cells

A

Undifferentiated stem cells which can give rise to more stem cells and specialist cells.

33
Q

inner cell mass

A

The mass of cells inside the embryo that will eventually give rise to the structures of the foetus.

34
Q

Embryo proper

A

Body of the offspring

35
Q

Trophoblast

A

the supporting structures of the embryo

36
Q

mircovilli

A

Extensions which increase the cell surface area and the efficiency of absorption

37
Q

Corpus luteum

A

A transient endocrine structure that produces progesterone.

38
Q

human chorionic gonadotropin (hCG)

A

hormone produced during pregnancy that stimulates the corpus luteum to produce progesterone. This maintains the pregnancy.

39
Q

Chorion

A

outermost embryonic membrane

40
Q

lacunae

A

irregular spaces that form around and between the villi, filling with maternal blood

41
Q

connecting stalk

A

A yolk sac that connects the embryo to the shell of trophoblasts

42
Q

amnion

A

the outer membrane around the embryo which attaches around the edge of the inner cell mass

43
Q

amniotic fluid

A

prevents compression of the embryo, cushions the embryo from the mothers movements and maintains a stable temperature.

44
Q

umbilical cord

A

Connects the umbilicus of the embryo to the placenta. Exchanges blood between the placenta and the embryo

45
Q

allantois

A

Formed ~third week, produces blood cells and umbilical blood vessels

46
Q

yolk sac

A

Formed ~ second week, produces blood cells, and gives rise to cells that will develop into sex cells.

47
Q

Gastrulation

A

Movement of cells in embryonic disc to form multiple layers.

48
Q

organogenesis

A

development of organs

49
Q

embryonic disk

A

forms the floor of the amniotic cavity

50
Q

gastrla

A

a 2 week old embryo

51
Q

neural tube

A

develops into the nervous system

52
Q

teratogens

A

substances which can cause birth defects