Symptoms may not start for 6 to 12 hours after exposure to the ultraviolet light. Symptoms include: 1  A feeling that something is in the eyes (foreign body sensation). 2  Sensitivity to light (photophobia). 3  Tearing.
It is divided into three stages, called trimesters: first trimester, second trimester, and third trimester. Conception to about the 12th week of pregnancy marks the first trimester. The second trimester is weeks 13 to 27, and the third trimester starts about 28 weeks and lasts until birth.
There is often confusion when some try to convert weeks into months and count a month as 4 weeks. February is the only month with just 4 weeks. The average calendar month is 30. 4 days, a little over 4 weeks and 2 days long. A normal pregnancy is 40 weeks, or, a little longer than nine average months.irst Trimester ends 13 weeks + 3 days ~ Second Trimester ends 26 weeks + 6 days Personal timeline for your Pregnancy-Print out and Keep a copy in your purse! Shows you a personal breakdown of the months and % of pregnancy completed.