Week 5 of pregnancy — 1st trimester. Baby is the size of a sesame seed 🌱, approximately 0.2cm long. Heart begins beating. Neural tube forming. Amniotic sac developing. 12% of the 40-week journey complete, 35 weeks remaining.
PREGNANCY WEEK 5 — 1st TRIMESTER
🌱
sesame seed
baby is about the size of a sesame seed
WEEK
5
of 40
LENGTH
0.2cm
crown to rump
WEIGHT
tiny
approximate
35 weeks remaining · Heart begins beating. Neural tube forming. Amniotic sac developing.
WEEK 5 — BABY'S DEVELOPMENT
1ST TRIMESTER · Weeks 1–12
Heart begins beating. Neural tube forming. Amniotic sac developing.
HOW YOU MAY FEEL
Nausea may intensify. Increased urination. Heightened sense of smell.
WEEK 5 KEY FACTS
Gestational age
Week 5
Trimester
1st (T1)
Baby length
0.2cm
Baby weight
tiny
Progress
12% complete
Weeks left
35 weeks
What happens at week 5 of pregnancy?
At week 5 of pregnancy (1st trimester):\n\nBaby development: Heart begins beating. Neural tube forming. Amniotic sac developing.\n\nBaby size: sesame seed 🌱\nLength: approximately 0.2cm (crown to rump)\nWeight: approximately too small to measure\n\nPregnancy progress: 12% complete (35 weeks remaining)\n\nGestational age is counted from the first day of your last menstrual period (LMP), not from conception. Week 5 begins on day 29 and ends on day 35 from your LMP.
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Pregnancy week 5 · 1st trimester · Baby size: sesame seed 🌱 · 0.2cm · tiny · Sources: ACOG, WHO fetal growth data