CRECIMIENTO Y DESARROLLO FETAL Flashcards

1
Q

PERIODO EMBRIONARIO

A

1-8 SEMANAS

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2
Q

SEMANA 1

A

Fecundación e implantación: comienzo del periodo embrionario

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3
Q

SEMANA 2

A

Endodermo y ectodermo

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4
Q

SEMANA 3

A

Primera falta del periodo; mesodermo y empiezan a formarse los somitas

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5
Q

SEMANA 4

A

Pliegues neurales; humanoide; yemas de brazos y piernas; longituds vértex-coccis 4-5 mm

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6
Q

SEMANA 5

A

5: placodas de cristalinos, boca primitiva, rayos digitales de las manos

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7
Q

SEMANA 6

A

Nariz primitiva, filtrum, paladar primario

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8
Q

SEMANA 7

A

Párpados, longitud vertex-coccis 2 cm

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9
Q

SEMANA 8

A

Se distinguen los ovarios y testículos

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10
Q

PERIODO FETAL

A

9 sem-término del embarazo

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11
Q

SEMANA 9

A

Comienza el periodo fetal; longitud vertex-coccis 5 cm; peso 8 grs

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12
Q

SEMANA 12

A

Se distinguen genitales externos

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13
Q

SEMANA 20

A

Límite inferior usual de viabilidad; peso 460 grs; longitud 19 cm

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14
Q

SEMANA 25

A

Comienza el tercer trimestre; peso 900 grs; longitud 24 cm

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15
Q

SEMANA 28

A

Ojos abiertos; el feto baja la cabeza; peso 1000-1300 grs

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16
Q

SEMANA 38

A

A término

17
Q

AMENAZAS PARA EL DESARROLLO DEL FETO

A
  • TERATOGÉNICOS: toxoplasmosis, rubéola, sífilis. Mercurio, talidomida, antiepilépticos, etanol. Hipertermia y radiación. Nicotina (SUSPENDER 4 MESES ANTES DEL EMBARAZO) y humo de tabaco, cocaína
  • MALA ALIMENTACIÓN
  • ESTRÉS