the
0
weeks
Week 0
Conception
Week 4
Getting the good news
Avoid dangerous chemicals
Avoid cat litter, which can cause toxoplasmosis
10
weeks
Week 6
Limit caffeine intake
Week 10
Diagnostic tests for genetic disorders and birth defects
Week 11
Pica may set in, reflecting nutrient deficiencies
Nuchal translucency test for Downs and other syndromes
Week 12
Uterus expands beyond pelvis
Avoid falls and abdominal trauma
20
weeks
Weeks 15-20
Further screening and diagnostic tests
Week 21+
Preeclampsia may occur, requiring urgent medical attention
30
weeks
Weeks 35-37
Test for Group B streptococcus
40
weeks