Normal Physiological Changes in Pregnancy


Pregnancy brings remarkable physiological changes in a woman’s body to support fetal growth and development. These changes affect almost every system, including the cardiovascular, respiratory, gastrointestinal, renal, endocrine, and reproductive systems.

 Physiological Changes During Pregnancy

1. Changes in Genital Organs
Vagina
Cervix
Uterus

2. Changes in Breast
Enlargement of breasts
Increased vascularity
Areola becomes darker
Preparation for lactation

3. Cutaneous Changes (Skin)
Chloasma (mask of pregnancy)
Linea nigra
Stretch marks (striae gravidarum)
Increased pigmentation

4. Weight Gain
Due to fetus, placenta, amniotic fluid
Increased blood volume and fat deposition

5. Hematological Changes
Increase in blood volume
Physiological anemia
Increased clotting factors

6. Cardiovascular System
Increased cardiac output
Increased heart rate
Slight fall in blood pressure

7. Water Retention
Edema of feet and ankles
Due to hormonal changes

8. Respiratory System
Increased oxygen consumption
Increased tidal volume
Mild breathlessness

9. Gastrointestinal Tract (GIT)
Nausea and vomiting
Heartburn
Constipation

10. Nervous System
Mood swings
Emotional changes
Fatigue

11. Urinary System
Increased frequency of urination
Increased renal blood flow

12. Nutritional Needs (Altered)
Increased requirement of:
Calories
Protein
Iron
Calcium
Folic acid

13. Metabolic Changes
Increased basal metabolic rate
Increased insulin resistance

14. Endocrine System
Increased activity of pituitary, thyroid, and adrenal glands
Placental hormone secretion.

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