QUIZBEE NUCAMA Flashcards
- Immediately before and after birth
- Begins at 22 completed weeks of gestation and
ends 7 completed days after birth - “Perinatal and maternal health are closely
linked” (WHO)
Perinatal Period
- Time span from fertilization to birth.
- First day of woman’s last menstrual period to
38 weeks.
Gestation Period
- Before birth
- Embryological development
➢Embryo – developing human for first
2 months after fertilization
➢All major adult organs are present
Prenatal Period
➢Fetus – from 9 weeks until birth
➢By end of 3rd month, placenta is
functioning
Fetal Development
➢First 42 days after birth
➢First 4 weeks of a child’s life –
changes are very rapid
NUCAMA340
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Neonatal Period
From ovulation to fertilization
Ovum
From fertilization to implantation
Zygote
From implantation to 5–8 weeks
Embryo
From 5–8 weeks until term
Fetus
Developing embryo and placental
structures throughout pregnancy
Conceptus
The earliest age at which fetuses
survive if they are born is generally
accepted as 24 weeks or at the point a
fetus weighs more than 500–600 g
Age of viability
(first 2 weeks,
beginning with fertilization)
Pre-embryonic
(weeks 3 through 8)
embryonic
(from week 8 through
birth
Fetal
also referred to as conception or
impregnation
Fertilization
the union of an ovum and a
spermatozoon
fertilization
Occurs in the outer third of a fallopian
tube, termed the ampullar portion.
Never a certain occurrence, depending on
the following factors:
Equal maturation of both sperm and
ovum
Ability of the sperm to reach the
ovum
Ability of the sperm to penetrate the
zona pellucida and cell membrane of
ovum and achieve fertilization
Fertilization
