QUIZ Flashcards
ovum may survive
no longer than
24 hours
Fertilization normally occurs in the distal third of the fallopian tube which is the
AMPULLA
when male ejaculates: average
2.5 ml semen
semen contains how many sperm
50-200 million (40-250 million) sperm/ml.
Protects the sperm from acidic environment of the vagina & coagulates slightly after ejaculation to hold the
semen deeply in the vagina
seminal fluid
sperm are relatively immobile for approx.
15 to 30 minutes
sperm undergo changes that enable one to penetrate
capacitation
theses are removed from the acrosome during capacitation
glycoprotein coat and seminal proteins
layers surrounding ovum
corona radiata
and zona pellucid
Sperm that reach the ovum release what?
Hyaluronidase
Acrosin
union of an ovum and a spermatozoon
FERTILIZATION
ovum is capable of fertilization for
only 24 hours (48 hours at
the most)
functional life of a spermatozoon is about
48 hours, possibly as long as 72 hours
Fertilization takes place in the
ampulla
Zygote formation occurs ____ after fertilization
12-14 days
The zygote (fertilized ovum) take _____s to enter the uterus
3-4 days
another word for implantation
nidation
It takes _____ to complete the process of nidation
7-10 days
- inner membrane
AMNION
- outer membrane
CHORION
face and neck are becoming evident
heart and blood vessels continue to develop
lungs, stomach, and liver start to develop
home pregnancy test is now positive
4 WEEKS
baby is now a little over half an inch in size
Eyelids and ears are forming,
tip of the nose is visible
arms and legs are well formed
The fingers and toes grow longer and more distinct
8 WEEKS
fetus measures about 2 inches
make its own
movements
o feel the top of your uterus
hear the baby’s heartbeat
sex organs of the baby become clear
12 WEEKS
The fetus measures about 4.3 to 4.6 inches and weighs about 3.5 ounces
baby’s eyes can blink
e heart and blood vessels are fully formed
fingers and toes have fingerprints
uterus felt 3 inches below your belly
16 WEEKS
baby weighs about 10 ounces and 6 inches long
uterus at the level of your belly button
baby can suck a thumb, yawn, stretch, and makes face
baby move, which
is called quickening
20 WEEKS
ultrasound is performed for all pregnant women at
20 weeks
fetus weighs 1.4 pounds
responds to sounds (moving or increasing its pulse)
jerking motions if it hiccups
able to sense being
upside down in the womb
24 WEEKS
fetus weighs about 2 pounds 6 ounces
changes position frequently
a good chance of survival
28 WEEKS
fetus weighs almost 4 pounds
Baby’s skin has fewer wrinkles
32 WEEKS
average size of baby at 36 weeks
18.5 inches and weighs close to 6 pounds
Brain has been developing rapidly
Lungs are nearly fully developed
36 WEEKS
what week? :
Zygote formation
Free flowing blastocysts
WEEK 1
what week? :
2 mm. in length
Midline of the back are formed
Heart is beginning to beat
WEEK 3
what week? :
4-6 mm. in length
4 g in weight
Budding of limbs occur
WEEK 5
what week? :
o 3 cm in length
o 2 g in weight
o Eyelids begin to appear
WEEK 6
what week? :
8 cm in length
45 g in weight
Face well formed
Spontaneous movement occur
WEEK 8
fetal blood begins to
exchange nutrients with the maternal circulation across the_____
chorionic villi
fetus derives O2 and excretes CO2 from
placenta
blood enters the uterus thru the
umbilical vein
umbilical vein carries the blood to the inferior vena cava thru the
ductus venosus
allows oxygenated blood to be supplied
directly to the fetal liver
ductus venosus
allows oxygenated blood to be supplied
directly to the fetal liver
ductus venosus,
opening in the atrial
septum
foramen ovale
Diagnosis of pregnancy based on pregnancy-related physical and hormonal changes:
presumptive,
probable,
positive.
changes may be noticed by the mother/health care
provider but are not conclusive for pregnancy
PRESUMPTIVE
Amenorrhea
Urinary frequency (6-12)
Breast and skin changes
are classified as
PRESUMPTIVE