Understanding the first trimester of pregnancy can help mothers and babies stay healthy

Pregnancy has three stages (trimesters), and each one is slightly different. While the growing baby reaches developmental milestones, your body will also experience different changes. Understanding what to expect from the first trimester can help you prepare yourself.

At Heights Obstetrics & Gynecology, our San Antonio OBGYNs offer comprehensive and compassionate care for expectant mothers. We also provide information and support as you move through this special time in your life.

What is the first trimester of pregnancy?

A full-term pregnancy lasts 40 weeks, and the first stage lasts until the 13th week of pregnancy. Many patients are surprised to learn that their pregnancy began on the first day of their last menstrual period.

To calculate your due date, our San Antonio OBGYNs add 40 weeks to the first day of your last period. As a result, you could already be four weeks along by the time you even know you’re expecting.

Below is some information that can help you understand early pregnancy:

• The first week is your period.
• Ovulation (the release of an egg) occurs during the second week. If the sperm fertilizes this egg, fertilization and conception occur.
• The third week is when the fertilized egg travels to the uterus. In the uterus, it then implants into the uterine lining and continues to grow.

Once the egg implants in the uterus, most people will start to experience early pregnancy symptoms. This includes a missed period.

What happens during the first stage of pregnancy?

The first trimester brings many physical and emotional changes. A surge in a hormone called estrogen drives these changes.

Although you might not see a so-called “baby bump” yet, you may notice other pregnancy symptoms.

• Nausea and vomiting (morning sickness)
• Breast tenderness
• Skin changes like acne
• Increased urination
• Mood swings
• Fatigue
• Bloating

During this stage, your uterus is also beginning to expand, and your blood volume starts to increase. This is all to support your growing baby.

What should you do during this pregnancy stage?

The first trimester is very important because the baby’s major organs are developing. To help support you and your baby during this time, it is wise to get started with prenatal care as soon as possible.

Our San Antonio OBGYNs can confirm your pregnancy and monitor it to ensure everything is going well. They can also recommend any lifestyle changes that could benefit you and your baby.

Additionally, our experienced obstetricians can help you start exploring your options for labor and delivery as well as postpartum care. We are here to support you through every single step of this incredible journey.

We invite you to contact us to schedule an appointment and get the prenatal care you need and the compassion you deserve.

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