NORMAL PREGNANCY EVENTS
FIRST TRIMESTER
Assuming a 40-menstrual-week pregnancy, the first trimester is assumed to
extend from conception through to 13 weeks.
Normal symptoms seen in the majority of pregnancies include nausea,
vomiting, fatigue, breast tenderness, and frequent urination.
Spotting and bleeding occur in 20% of pregnancies, 50% of which will
continue successfully.
Average weight gain is 5–8 pounds.
Complications include spontaneous abortion.http://ebookobgyne.net