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.
Trimester = the pregnancy is divided into 3 âtrimesters.â. The first one is from LMP up until 12 or 13 weeks. The second trimester is from 12-13 weeks until 28 weeks. The third trimester is from 28 weeks until delivery. NSVD = normal spontaneous vaginal delivery.