Pregnancy Development Calendar
If you've missed a period, have tender breasts, are tired and nauseated, you're probably pregnant. Your baby starts as a tadpole-size embryo and grows in 9 months to a full-grown infant. In the womb, the embryo begins to develop fingers, toes, eyes and organs.
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First Few Months
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By the second month, the baby is the size of a pinto bean. The baby's face is beginning to form eyelid folds, the tip of the nose and ears. The heart's aortic and pulmonary valves are distinct. Tubes from the throat to the lungs are beginning to form. The baby's torso is getting longer and straighter.
The Third Month
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The third month has your baby slightly bigger than a large lime. You should be able to hear your baby's heartbeat at an ultrasound. Fingers and toes are separated and growing nails. Genitalia is beginning to show signs of male or female. Your baby is moving, though you probably can't feel it yet.
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The Fourth Month
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In the fourth month, the baby develops fingerprints and toe prints. Lanugo, or temporary hair, forms over the body. The baby can suck his thumb, swallow amniotic fluid and excrete it as urine, and practice breathing. His bones are getting stronger and he's moving more.
The Fifth Month
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The baby becomes more active as muscles strengthen, nerve networks expand and bones continue to harden. Ears are developed and able to recognize sound. His face can make a variety of expressions, and eyebrows and head hair are visible.
The Sixth Month
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In the sixth month, your baby weighs close to 2 lbs. and is more than a foot long. Your baby's eyes can open and close and react to light. Vocal cords function and the baby is able to grasp things. Hiccups are common as well.
The Seventh Month
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In the seventh month, the baby is gaining weight quickly and the lanugo is beginning to disappear. Eyebrows and eyelashes are present, and nails have reached the ends of the fingers and toes.
The Eighth and Ninth Months
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The eighth month brings creases around the baby's wrists and neck, and dimples on the knees and elbows. Because of the increasingly cramped space, you'll feel less kicking and more turning and wiggling. The lungs are reaching maturity. In the ninth month, the baby continues to grow rapidly, and baby will settle into the head-down position, getting ready for birth.
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