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The eleventh week of pregnancy is characterized by significant growth and development as the baby continues to mature inside the womb. During this period, the fetus undergoes rapid growth, and its sensory organs begin to develop. In this article, we will explore the key milestones that occur during the eleventh week of pregnancy, including physical changes in the baby, sensory development, hormonal changes, and the physical and emotional experiences of the mother.

Fetal Development

During the eleventh week of pregnancy, the fetus experiences notable advancements in growth and organ development:

  1. Rapid Growth: The baby undergoes a growth spurt, with an increase in length and weight. It starts to resemble a more human-like form as the head becomes more proportional to the body.
  2. Developing Senses: The fetus’s sensory organs continue to develop, laying the foundation for future sensory experiences:
    • Hearing: The ears are positioned correctly on the sides of the head, and the auditory system begins to develop. Although the baby cannot yet hear sounds in the external environment, it can perceive vibrations and may respond to loud noises.
    • Vision: The eyelids remain fused shut, protecting the developing eyes. The retina continues to develop, and the optic nerves are maturing.
    • Taste and Smell: Taste buds form on the tongue, setting the stage for the baby’s ability to taste flavors in the future. The olfactory receptors, responsible for the sense of smell, also begin to develop.
  3. Organ Development: Organ systems continue to mature and become more functional:
    • Digestive System: The intestines, which have been growing inside the umbilical cord, start to move into the abdominal cavity. The pancreas continues to secrete digestive enzymes.
    • Kidneys: The kidneys are fully developed and start producing urine, which is excreted into the amniotic fluid.
    • Skeleton and Muscles: The bones continue to ossify, and the muscles become stronger, allowing for more coordinated movements.
    • Reproductive System: In males, the prostate gland and penis begin to form, while in females, the ovaries continue to develop.


Hormonal Changes

Hormonal changes play a vital role in supporting the pregnancy and the overall well-being of the mother:

  1. Progesterone: Progesterone levels remain elevated to maintain the pregnancy, support the growth of the uterine lining, and prevent contractions.
  2. Estrogen: Estrogen levels continue to rise, contributing to the growth and development of the breasts and the stimulation of blood flow to the uterus.

Physical and Emotional Changes

During the eleventh week of pregnancy, the mother may experience various physical and emotional changes:

  1. Growing Belly: The uterus continues to expand and rises higher in the abdomen. The mother’s belly becomes more noticeable, and she may need to adjust her clothing and wear maternity clothes for comfort.
  2. Breast Changes: The breasts continue to increase in size and may feel tender and sensitive. The areolas may darken further, and Montgomery’s tubercles may become more pronounced.
  3. Increased Energy: Some women experience a boost in energy during the second trimester, which begins around the eleventh week. The fatigue experienced in the earlier weeks may decrease.
  4. Emotional Well-being: Hormonal fluctuations can affect mood and emotions. The mother may experience a mix of excitement, anxiety, and mood swings. It is important to seek support from loved ones and practice self-care.
  5. Skin Changes: Pregnancy hormones can lead to changes in the skin, such as increased oil production, which may cause acne. Some women may notice changes in skin pigmentation, including darkening of the nipples, areolas, and the appearance of a dark line called linea nigra on the abdomen.


The eleventh week of pregnancy marks a period of rapid growth and development for the fetus. The baby’s sensory organs continue to mature, and organ systems become more functional. As the pregnancy progresses, the mother may experience physical changes, heightened senses, and a range of emotions. Monitoring the pregnancy’s progress and seeking prenatal care remain crucial during this stage.


Aman k. Kashyap

I am a hard-working and driven medical student who isn't afraid to face any challenge. I'm passionate about my work . I would describe myself as an open and honest person who doesn't believe in misleading other people and tries to be fair in everything I do.

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