The duration of normal pregnancy is 266-280 days or 38-42 weeks (average is 40 weeks) or 9 calendar months or 10 lunar months. Any baby, therefore, who is born before the 38th week of gestation is called preterm and a baby born after the 42nd week of gestation is said to be post term.
A. Diagnosis of Pregnancy
1. Urine examination – human chorionic gonadotropin (HCG) in the urine is the basis for pregnancy tests. It is present from the 40th day through the 100th day, reaching a peak level on the 60th day. HCG, therefore, is most correct 6 weeks after the LMP. When collecting urine for pregnancy testing:
a. No water taken after 8 PM the night before urine collection in order to concentrate urine
b. First morning urine, midstream, should be collected in a clean, dry jar
c. If more than 1 hour would lapse before being tested, refrigerate specimen because HCG is unstable under room temperature
d. Types of urine exams for pregnancy:
Biological tests – presence of HCG will produce hemorrhagic changes in the ovaries/testes of the animal when the urine of a pregnant woman is injected.
E.g. Ascheim-Zondek – mice; Freidman – rabbit; Frank Berman – rat; Hogben – toad; male frog. Is actually obsolete.
Immunodiagnostic tests – antigen-antibody reaction. Widely used at present because results are obtained faster and do not involved the sacrifice of an animal. E.g. Gravindex; Pregnex; Prognosticon
2. Progesterone Withdrawal Test – also a test to diagnose pregnancy. A contraceptive pill is taken by the woman three times a day for 3 days pregnancy test pill (Gestex) is taken once. If menstruation occurs within 10-15 days after, the woman is not pregnant. If pregnant, there will be no menstruation because the corpus luteum produces enough hormones to neutralize the effect of withdrawn synthetic progesterone.
B. Components of a prenatal visit
1. History-taking
a. Personal data – patient’s name, age, address, civil status (an unwed pregnancy is a risk pregnancy) and family history (with whom does she live? Are there familial disease that could possible affect the pregnancy?)
b. Obstetrical data
Gravida – number of pregnancies a woman has had
Para – number of viable deliveries, regardless of number and outcome
TPAL score – (_ _ _ _) – number of full term babies; premature babies; abortions; living children
Past pregnancies
o Method of delivery – normal spontaneous vaginal? Cesarean section (CS)? Indication for past CS?
o Where – At home? In the hospital?
o Risks involved – Prematurity? Toxemia?
Present pregnancy
o Chief concern – Is there nausea and vomiting?
o Danger signals:
Vaginal bleeding, no matter how slight
Swelling of face or fingers
Severe continuous headache
Dimness or blurring of vision
Flashes of light or dots before the eyes
Pain in the abdomen
Persistent vomiting
Chills and fever
Sudden escape of fluids from the vagina
Absence of fetal heart sounds after they have been initially auscultated on the 4th or 5th month
c. Medical data – Is there a history of kidney, cardiac or liver disease; hypertension; tuberculosis; sexually-transmitted disease (STDs)?
2. Assessment
a. Physical examination – a review of systems is indicated, including inspection of the teeth because they are common foci of infection
b. Pelvic examination (Cardinal rule: Empty the bladder first)
Internal Exam (IE) to determine Hegar’s, Chadwick’s and Goodell’s
Ballotement – fetus will bounce when lower uterine segment is tapped sharply (on 5th month of pregnancy)
Papanicolau smear (Pap smear) – cytological examination to diagnose cervical carcinoma.
Classification of findings:
Class 1 – absence of atypical or abnormal cells (normal)
Class 2 – atypical cytology but no evidence of malignancy
Class 3 – cytology suggestive of malignancy
Class 4 – cytology strongly suggestive of malignancy
Class 5 – conclusive for malignancy
Clinical stages that reflects localization or spread of malignant changes:
Stage 1 – CA confined to the cervix
Stage 2 – CA extends beyond cervix into the vagina, but not into pelvic wall or lower 1/3 of the vagina
Stage 3 – metastasis to the pelvic wall
Stage 4 – metastasis beyond pelvic wall into the bladder and rectum
Pelvic measurements are preferably done after 6th lunar month. X-ray pelvimetry (several flat plate X-ray pictures of the pelvis are taken from different angels), however, is the most effective method of diagnosing cephalopelvic disproportion (CPD). But since X-rays are teratogenic, the procedure can be done only 2 weeks before EDC.
Leopold’s maneuvers – to determine presentation, position and attitude; estimate fetal size and locate fetal parts.
o Preparatory steps:
Palpate with warm hands xxx cold hands cause abdominal muscles to contract
Use palms not fingertips
Position patient on supine, with knees flexed slightly (-dorsal recumbent position) so as to relax abdominal muscles
Use gentle but firm motions
o Procedure:
First maneuver: Facing head part of pregnant woman, palpate for the fetal part found in the fundus to determine presentation (a hard, smooth, round, ballotable mass at the fundus means the fetus is in breech presentation
Second maneuver: Palpate sides of the uterus to determine the location of the fetal back and the small fetal parts
Third maneuver: Grasp lower portion of abdomen just above the symphysis pubis to find out degree of engagement
Fourth maneuver: Facing the feet part of the patient, press fingers downward on both sides of the uterus above the inguinal ligaments to determine attitude (-degree of flexion of fetal head)
c. Vital signs – temperature and pulse and respiratory rates are important especially during the initial prenatal visit. But certainly more important are the weight and blood pressure as baseline data to determine any significant increases.
d. Blood studies
Blood typing
Complete blood count, including Hgb and Hct, to determine anemia
Serological tests (VDRL and Kahn & Wasserman) to diagnose for syphilis
e. Urine examinations
Heat and acetic acid test to determine albuminuria. Any sign of albumin in the urine should be reported immediately because it is a serious sign of toxemia
Benedict’s test for glycosuria, a sign of possible gestational diabetes. Specimen should be taken before breakfast to avoid false positive results. Should not be more than +1 sugar.
Determination of pyuria. Urinary tract infection has been found to be a common cause of premature delivery.
3. Important Estimates
a. Estimates of age of gestation (AOG):
Naegele’s Rule – calculation of expected date of confinement (EDC). Count back three months from the first day of the last menstrual period (LMP) then add 7 days. Substitute number for month for easy computation.
McDonald’s Method – determines age of gestation by measuring from the fundus to the symphysis pubis (in cm.) then divide by 4 = AOG in months. E.g., fundic height of 16 cm. divided by 4 = 4 months AOG = 16 weeks AOG.
Bartholomew’s Rule – estimates AOG by the relative position of the uterus in the abdominal cavity.
o By the 3rd lunar month, the fundus is palpable slightly above the symphysis pubis
o On the 5th lunar month, the fundus is at the level of the umbilicus
o On the 9th lunar month, the fundus is below the xiphoid process
b. Arey’s Rule – determines the length of the fetus in centimeters.
During the first half of pregnancy, square the number of the month (E.g., first lunar month: 1 x 1 = 1 cm.)
During the second half of pregnancy, multiply the month by 5 (E.g., 6th lunar month: 6 x 5 = 30 cm.)
o Vitamin D – fish, liver, eggs, milk (excess Vit. D during pregnancy can lead to fetal cardiac problems
o Vitamin E – green leafy vegetables, fish
o Vitamin C – tomatoes, guava, papaya
o Vitamin B – foods rich in proteins
o Calcium/phosphorus – milk, cheese
o Iron – especially important during the last trimester when the pregnant woman is going to transfer her iron stores from herself to her fetus so that the baby has enough iron stores during the first 3 months of life when all he takes is milk (which is deficient in iron). Iron has a very low absorption rate; only 10% of the iron intake can be absorbed by the body. Thus, for optimum absorption, give Vitamin C. Iron should be given after meals because it is irritating to the gastric mucosa. Sources: liver and other internal organs camote tops, kangkong, egg yolk, ampalaya
Table 4. Quantities of Food Necessary During Pregnancy
NUTRIENTS | ACTIVE NON-PREGNANT | PREGNANT |
Meat Vegetables: Dark green or deep yellow Other vegetables Fruits: Citrus Other fruits Breads and cereal Milk Additional fluid | 2 servings of meat, fowl or fish/day; 3-5 eggs per week 1 serving (at least 3/week) 2 or more servings 1 serving 1 serving 4 or more servings 1 pint (8 oz. glasses) Ad libitum | 2-3 servings of meat, fowl or fish/day; 1 egg daily 1 serving daily 2-3 servings 1 serving 1 serving 4 servings 1 quart (4, 8 oz. glasses) At least 2 glasses daily |
* Malnutrition during pregnancy can result in prematurity, preeclampsia, abortion, low birth weight babies, congenital defects or even stillbirths.
b. Smoking – causes vasoconstriction, leading to low birth weight babies and, therefore, is contraindicated during pregnancy
c. Drinking – in moderation is not contraindicated but when excessive can cause transient respiratory depression in the newborn and fetal withdrawal syndrome; besides, alcohol supplies only empty calories.
d. Drugs – dangerous to fetus especially during the first trimester when the placental barrier is still incomplete and the different body organs are developing. Are teratogenic (can cause congenital defects) and, therefore, contraindicated unless prescribed by the doctor.
Thalidomide – causes amelia or phocomelia
Steroids – can cause cleft palate and even abortion
Iodides – (contained in many over-the-counter cough suppressants) – cause enlargement of the fetal thyroid gland, leading to tracheal decompression and dyspnea at birth
Vitamin K – causes hemolysis and hyperbilirubinemia
Aspirin/Phenobarbital – causes bleeding disorders
Tetracycline – causes staining of long bones (not given also to children below 8 years for the same reasons)
e. Sexual activity
Sexual desires continue throughout pregnancy, but levels change:
o During the first trimester, there is a decrease in sexual desires because the woman is more preoccupied with the changes in her body
o During the second trimester, there is an improvement in sexual desires because the woman has adapted to the growing fetus
o During the third trimester, there is another decrease in sexual desires because the woman is afraid of hurting the fetus
Sex in moderation is permitted during pregnancy but not during the last 6 weeks of pregnancy because it has been found out that there is increased incidence of postpartum infection in women who engage in sex during the last 6 weeks. Counsel the couple to look for more comfortable positions.
Sex is contraindicated in the following situations:
o Spotting or bleeding
o Incompetent cervical os
o Ruptured BOW
o Deeply engaged presenting part
f. Employment – as long as the job does not entail handling toxic substances, or lifting heavy objects, or excessive physical or emotional strain, there is no contraindication to working. Advise pregnant women to walk about every few hours of her work day during long periods of standing or sitting to promote circulation.
g. Traveling – no travel restrictions, but postpone a trip during the last trimester. On long rides, 15-20 minute rest periods every 2-3 hours to walk about or empty the bladder is advisable.
h. Exercises
Chief aim: To strengthen the muscles used in labor and delivery
Should be done in moderation
Should be individualized: according to age, physical condition, customary amount of exercise (swimming or tennis not contraindicated unless done for the first time) and the stage of pregnancy
Recommended exercises:
o Squatting and tailor-sitting – help stretch and strengthen perineal muscles; increase circulation in the perineum; make pelvic joints more pliable. When standing from the squatting position, raise buttocks first before raising the head to prevent postural hypotension.
o Pelvic rock – maintain good posture; relieves abdominal pressure and low backaches; strengthens abdominal muscles following delivery
o Modified knee-chest position – relieves pelvic pressure and cramps in the thighs or buttocks; relieves discomfort from hemorrhoids
o Shoulder-circling – strengthens muscles of the chest
o Walking – said to be the best exercise
o Kegel – relieves congestion and discomfort in pelvic region; tones up pelvic floor muscles
i. Prepared Childbirth/Childbirth Education – preparing the pregnant couple for child-bearing
Operates basically on the “Gate Control Theory” of pain: Pain is controlled in the spinal cord. To ease pain in one body part, the “gate” to this pain should be “closed”.
Premises:
o Discomfort during labor can be minimized if the woman comes into labor informed about what is happening and prepared with breathing exercises to use during labor
o Discomfort during labor can be minimized if the woman’s abdomen is relaxed and the uterus is allowed to rise freely against the abdominal wall with contractions.
Major approaches to prepared childbirth-pregnant couples are taught about anatomy, pregnancy, labor and delivery, relaxation techniques, breathing exercises, hygiene, diet, comfort measures:
o Grantly-Dick Read Method: Fear leads to tension and tension leads to pain.
o Lamaze – psychoprophylactic method; based on the stimulus-response conditioning. To be effective, full concentration on breathing exercises during labor should be observed. (Implication: Nurse should not interrupt the couple doing breathing exercises.)
j. Tetanus immunization – given 0.5 ml IM (deltoid region of the upper arm) to all pregnant women any time during pregnancy. It shall be given in two doses at least 4 weeks apart, with the second dose at least 3 weeks before delivery. Booster doses shall be given during succeeding pregnancies regardless of the interval. Three booster doses will confer a lifelong immunity.
k. Clinic appointments:
First 7 lunar months – every month
On 8th and 9th lunar months – every other week – twice a month
On 10th lunar month – every week until labor pains set in
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