What are the symptoms during the first month of pregnancy?

Sep 15, 2025 Source: Cainiu Health

Dr. Zhang Lu

Introduction

In general, the main symptoms during the first month of pregnancy include missed period, nausea and vomiting, breast tenderness, fatigue and drowsiness, and frequent urination. If discomfort occurs, it is recommended to seek timely medical examination at a正规 hospital. In addition, some pregnant women may also experience changes in appetite, emotional sensitivity, and mild abdominal distension. If pregnancy is suspected, prompt medical consultation is necessary for confirmation, and adequate rest should be ensured in daily life.

Generally, the main symptoms during the first month of pregnancy include missed period, nausea and vomiting, breast tenderness, fatigue and drowsiness, and frequent urination. If discomfort occurs, it is recommended to seek timely medical evaluation at a reputable hospital. Detailed explanations are as follows:

1. Missed Period

After pregnancy, the ovaries stop releasing eggs, and the uterine lining thickens in preparation for embryo implantation, thus no longer shedding as menstrual flow. Therefore, a missed period typically indicates pregnancy. If your menstrual cycle has been regular and your period is delayed by more than a week, pregnancy should be considered. For those with irregular cycles, other symptoms should also be considered for assessment.

2. Nausea and Vomiting

During pregnancy, the level of human chorionic gonadotropin (hCG) increases in the body, which stimulates the gastrointestinal mucosa, slows gastrointestinal motility, and disrupts digestion, leading to nausea and vomiting. Symptoms are often more pronounced in the morning; some individuals may also experience nausea triggered by cooking fumes or unpleasant odors, with varying severity among individuals.

3. Breast Tenderness

Following pregnancy, increased secretion of estrogen and progesterone stimulates breast tissue development, causing breast gland congestion and swelling, which leads to breast tenderness. On touching, the breasts may feel softer, the nipples and areolas may darken in color, and some individuals may experience slight tenderness in the nipples.

4. Fatigue and Drowsiness

During pregnancy, the body's metabolism accelerates and energy consumption increases. Hormonal changes also affect nervous system function, causing pregnant women to often feel tired and sleepy. Even after light daily activities, fatigue can easily occur, though it may temporarily improve with rest.

5. Frequent Urination

In early pregnancy, the uterus gradually enlarges, compressing the bladder in front of it, reducing bladder capacity, and decreasing the ability to store urine. This results in frequent urination, characterized by an increased number of urinations but smaller volume each time, without discomfort such as pain or urgency, which is considered a normal physiological response.

In addition, some pregnant women may also experience changes in appetite, emotional sensitivity, and mild abdominal distension. If pregnancy is suspected, timely medical consultation is necessary for confirmation. It is also important to ensure adequate rest in daily life and avoid strenuous exercise and excessive fatigue.

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