What are the three trimesters of pregnancy?

First trimester: conception to week 12, second trimester: week 13 to week 26, third trimester: week 27 to birth.

What happens during the embryonic period of pregnancy?

Major organs like the brain, spinal cord, and heart begin to form.

Missed periods, nausea, breast changes, mood swings, fatigue.

By the end of the first trimester, around week 12.

The first trimester of pregnancy is crucial as it marks the period of major organ formation in the developing fetus, starting from the zygote stage to the emergence of limbs, fingers, toes, and facial features by the end of this phase. It is essential to be aware of common pregnancy symptoms such as missed periods, nausea, breast changes, mood swings, and fatigue during this time, and seeking guidance from healthcare professionals for any concerns is highly recommended.
The process of pregnancy, from conception to the formation of major organs, occurs within the first trimester, highlighting the rapid and intricate development that takes place within the initial weeks. Understanding the timeline of events, such as ovulation, fertilization, implantation, and subsequent embryonic growth, provides a foundational knowledge of the early stages of pregnancy and underscores the critical importance of monitoring both the baby's development and the mother's health throughout this period.

What are the three trimesters of pregnancy?
First trimester: conception to week 12, second trimester: week 13 to week 26, third trimester: week 27 to birth.
What happens during the embryonic period of pregnancy?
Major organs like the brain, spinal cord, and heart begin to form.
What are common pregnancy symptoms in the first trimester?
Missed periods, nausea, breast changes, mood swings, fatigue.
When does an embryo become a fetus during pregnancy?
By the end of the first trimester, around week 12.
What is the size of the developing fetus by the end of the first trimester?
About 1.25 inches long.

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Pregnancy typically lasts about 40 weeks, divided into three trimesters. During the first trimester, ovulation occurs around the second week, leading to conception when a sperm fertilizes an egg in the fallopian tubes, forming a zygote. This zygote develops into a blastocyst, which implants in the uterus lining by week four, initiating the embryonic period where major organs like the brain, spinal cord, and heart begin to form.
By the end of the first trimester, the embryo is called a fetus, about 1.25 inches long, with developed limbs, fingers, toes, and facial features. Pregnancy symptoms during this period may include missed periods, nausea, breast changes, mood swings, and fatigue, among others. Consult your healthcare provider for any concerns regarding your baby's development or your well-being.