Most children get roseola between 7 and 13 months of age. It is quite rare before three months or beyond 4 years. Fully 90% of cases occur before the 2nd birthday. Rare cases have been seen in adults, and a very few have been reported in pregnant women.
Your baby's head is now about 1/3 of its total body length. The facial features are being defined. The body is growing quickly and the fingernails are developing. The baby's sex can usually be identified by this time period.
Your baby's skin is pink to reddish in color and is smooth. The body is continuing to fill out. The sucking and grasping reflexes are strong. At about 34 weeks, a substance that is necessary for the lungs to function (surfactant) is steadily produced.
Your baby's head, arms, legs, and body are now fully formed. At 20 weeks, he weighs about 1 pound and is about 7½ inches in length. His movement will become increasingly noticeable to you.
Looking for a fetal development overview? Check out what's going on with your baby week by week!
If current trends continue, smoking will have a tremendous health impact on smoking mothers and their unborn or born children. Women who smoke during pregnancy are at risk for premature birth, pregnancy complications, low-birth weight infants, stillbirth, and a higher rate of infant mortality.