What are the first signs of pregnancy from week to week?

TIME OF OCCURRENCE (GESTATIONAL AGE)
SIGN
OTHER POSSIBLE CAUSES
Presumptive Signs (you may be pregnant)

3 – 4 week
Breast changes
Premenstrual changes, oral contraceptives

4 week
Amenorrhea (lack of period)
Stress, vigorous exercise, early menopause, endocrine problems, malnutrition

4 – 14 week
Nausea, vomiting
GI upset (flu), food poisoning

6 – 12 week
Urinary frequency
Infection, pelvic tumors

12 week
Fatigue
Stress, illness

16 – 20 week
Quickening (feeling “baby” move)
Gas, peristalsis (normal movement of food through intestines)


Probable signs (you probably are pregnant)

5 week
Softening of cervix (Goodell's sign)
Pelvic congestion

6 – 8 week
Bluish tinge of vulva/vagine (Chadwick's sign)
Pelvic congestion

6 – 12 week
Softening of cervical isthmus (Hegar's sign)
Pelvic congestion

4 – 12 week
Positive pregnancy test (blood)
Hydatidiform mole, choriocarcinoma

6 – 12 week
Positive pregnancy test (urine)
Pelvic infection, tumor

16 week
Braxton Hicks contractions (false labor)
Myomas, other tumors

POSITIVE SIGNS

5 – 6 week
Visualization of fetus by real-time ultrasound examination
No other causes

6 week
Fetal heart tones detected by ultrasound examination

8 – 17 week
Fetal heart tones detected by Doppler ultrasound stethoscope

16 week
Visualization of fetus by x-ray study

17 – 19 week
Fetal heart tones detected by fetal stethescope

19 – 22 week
Fetal movements felt with hand

Late pregnancy
Fetal movements visible


SOURCE

MOSBY'S NURSING PDQ