|
Week |
Mother |
Baby |
|
1 |
Menstrual Period |
|
|
2 |
Uterine lining thickens. Pituitary stimulates maturity of
the egg. |
|
|
3 |
Ovulation. Fertilization. Uterine mucosa thickens. |
Cluster of cells journey to uterus through the fallopian
tubes. |
|
4 |
May not have noticed any difference. Some may notice
metallic taste in mouth. |
Blastocyst reaches uterus - then begin embedding in the
uterine lining. Differentiation of the cells begin - amnion,
yolk sac, placenta and rapidly growing embryonic disc. |
|
5 |
Menstrual period is late. May suspect pregnancy. |
Brain with 2 lobes and spine forming. Heart developing
and begins to beat. Embryo is 1/10 inch long - the size of a
grain of rice. |
|
6 |
Cervix is softening and bluish in color. May feel bladder
pressure. Uterus is beginning to enlarge. |
Baby has a head and trunk. Tiny limb buds begin to
appear. Circulation begins. Jaw and mouth are developing with 10
dental buds in each jaw. |
|
7 |
Breasts larger. The Montgomery glands appear. The nipples
become more prominent. Increased vaginal mucus secreted. Mucus
plug forming. |
Limb buds now resemble tiny arms and legs. Head has human
shape. Spinal cord and brain almost complete. Embryo 1/2 inch
long. Placenta now taking shape. |
|
8 |
Certain food and odors, tobacco and alcohol may now be
unappealing. |
All main internal organs are present, but not yet
developed fully. Eyes and ears growing. Face is taking on human
shape/ The length is just under 1 inch and weight is 1 gram. |
|
9 |
Skin changes may occur, gums soften, thyroid may be more
prominent. |
Limbs are developing rapidly, fingers and toes being
defined. Baby moves very gently. Eyelids forming. Genital ridge
visible, but sex cannot be determined. Baby weighs about as much
as a grape. |
|
10 |
Uterus is the size of an orange. Uterine cavity almost
filled. 1/3 of uterine wall filled by placenta. |
Placenta produces progesterone. Baby's ankles and wrists
are formed, finger and toes clearly visible. Human appearance.
Respiratory effort present. |
|
11 |
Colostrum may be present in breasts. Nausea may decrease
or stop. Increasing blood volume. Uterine cavity filled. |
Eyelids are forming but fused. Baby's heart beat heard
with Doppler. (Unless uterus is tilted or mom is heavy.) |
|
12 |
Uterus the size of a grapefruit. |
Head is more rounded. Some bones will be outlined. Nails
forming. The sex can now be recognized. The length is about 2
1/2 inches and weight is 1/2 oz. |
|
|
|
13 |
Uterus is rising out of the pelvis. The bladder pressure
may be less. |
All systems are formed now, yet still must mature.
Muscles contract weakly. |
|
14 |
Uterus becoming abdominal organ. Linea nigra may appear.
Blood volume starts to increase. Cardiac output larger. May feel
less tired and more fit. |
Sex is easily determined. Eyebrows now forming. Small
amount of hair noted on head. May drink some amniotic fluid and
urinate. The length is about 3 3/4 inches. |
|
15 |
Cardiac output increased by 20%. Clothes feel tight. |
Hair on head and eyebrows. Lanugo appearing. |
|
16 |
Waistline disappearing. 'Butterflies' in stomach.
Colostrum may be expressed. |
Muscles can contract more vigorously. The length is 6 3/4
inches and weight about 5 oz. |
|
17 |
Uterine souffle may be heard. The height of the fundus is
halfway between symphysis pubis and umbilicus. Nasal congestion
may increase. |
Skeleton visible on x-ray. Weighs more than placenta. May
be startled by sounds outside the uterus. |
|
18 |
You have probably gained about 10 pounds. Women usually
gain a total of 25 to 30 pounds during pregnancy, mostly in the
later months. |
Vernix caseosa (Cheesy like protection of the skin on
baby) is forming. Meconium is collecting in intestinal tract.
Reflexes of kicking, grasping, sucking may begin. The length is
about 8 inches. |
|
19 |
Uterine wall thinning.You can probably feel your uterus
protruding a little below your belly button. |
Permanent tooth buds begin to form. The onset of rapid
growth begins. |
|
20 |
Umbilicus (belly button) may be smooth or popping out.
Chest (not breast) expansion occurs. Placenta covers half of
uterine wall. Internal ballottment may be felt. Round ligament
pain occurs. |
The length is about 10 inches. Weight is about 3/4 lb.
You're about halfway through your pregnancy! |
|
21 |
Height of the fundus slightly below the umbilicus. |
Eyebrows and eyelashes noticeable. |
|
22 |
External ballottment may be felt. The linea nigra is more
prominent. |
Baby has periods of activity and rest. Now that the baby
has been developing for about five months, he or she will be
able to use her own immune system to help defend herself against
infection. |
|
23 |
Different body parts of the baby may be felt through
abdominal wall. May notice ligament stretching sensations.
Braxton-Hicks contractions may start. |
The baby's movements are becoming more coordinated as
more nerve fibers connect, and he will start to react to sounds
or music around this time. |
|
24 |
Height of fundus is at umbilicus. Period of increased
weight gain begins. (4-5 lbs. per month) |
Length about 13 inches. Weight about 1 1/4 lbs. The skin
is wrinkled. |
|
25 |
Stretch marks appear. |
Skin red & shiny. Face wrinkled. Old man like look. |
|
26 |
Fundus is slightly above the umbilicus. Period when
hemoglobin begins to be low. |
Weight is about 1 1/2 pounds. |
|
|
|
27 |
Uterine wall soft and yielding. Period of largest weight
gain continues. |
Testes descend in males. Subcutaneous fat is stored, but
skin remains wrinkled. Iron storage continues. |
|
28 |
Fundus is about 3 fingers above the umbilicus. Anemia is
most common due to iron shortage by baby. Hematocrit is checked
again. |
The baby is now considered viable. Finger prints set.
Eyelids open. The length is about 14 inches and weight is 2
pounds. |
|
29 |
Feeling of increased pressure on diaphragm, liver,
stomach and intestine. |
Weak cry. More rapid period of growth begins. |
|
30 |
Braxton-Hicks contractions (false labor contractions) are
felt more. |
Large deposits of calcium begin to be deposited. |
|
31 |
Large amounts of calcium are lost to the baby. |
Weight is about 4 pounds. |
|
32 |
Pelvic joints begin to relax. |
Length is about 16 inches. |
|
33 |
Striae gravidarium are more marked. Pelvis relaxes more. |
The baby's pupils will react to light and dilate or
constrict. When your baby sleeps now, he or she
goes through REM and non-REM stages. |
|
34 |
Braxton-Hicks are stronger. |
Vernix covers body. Babies born at this time usually
survive in the hospital. |
|
35 |
Heartburn is very common. |
Weight about 5 1/2 pounds and length is about 18 inches. |
|
36 |
Belly button begins to protrude. Baby may be lower in
pelvis. (Called lightening) |
Baby's skin thicker and less wrinkled in appearance.
Kidneys mature. |
|
37 |
Frequency of urination increases. Ankles may have more
swelling. |
Baby is well formed. Now considered full term. Weight
gain bay be as much as 1 oz. per day. Lungs mature. |
|
38 |
Be sure the baby is moving at least 10 times a day. At
this point, you should alert your practitioner if hours go by
without any movement, or if you're at all concerned. |
The baby weighs nearly seven pounds
and measures about 14 inches. |
|
39 |
Cervix may be ripening for labor. Strong Braxton-Hicks
contractions. |
Amniotic fluid replaced every three hours. |
|
40 |
Presenting part is now in the lower segment of the
uterus. |
Lanugo is now beginning to disappear. Length is about 20
inches. |
|
41 |
Physician may order tests to monitor fetal well being. |
Lanugo gone. May begin to have dry skin. Can lose some
subcutaneous fat. More likely to pass meconium. |
