First Trimester (Weeks 1-13)

Week	Baby Size	Length	Weight	Key Development
4	Poppy seed	0.04 in	—	Implantation, cells dividing
5	Sesame seed	0.05 in	—	Heart begins to beat
6	Lentil	0.08 in	—	Brain forming, arm/leg buds
7	Blueberry	0.3 in	—	Hands/feet forming
8	Raspberry	0.6 in	0.04 oz	Fingers forming, baby moves
9	Cherry	0.9 in	0.07 oz	All essential organs formed
10	Strawberry	1.2 in	0.14 oz	Fingers/toes separate
11	Fig	1.6 in	0.25 oz	Tooth buds, nails forming
12	Lime	2.1 in	0.49 oz	Reflexes develop, can suck thumb
13	Peach	2.9 in	0.81 oz	Fingerprints forming, vocal cords

Second Trimester (Weeks 14-27)

Week	Baby Size	Length	Weight	Key Development
14	Lemon	3.4 in	1.5 oz	Can make facial expressions
16	Avocado	4.6 in	3.5 oz	Can hear sounds, eyes move
18	Bell pepper	5.6 in	6.7 oz	Can yawn, hiccup; gender visible
20	Banana	6.5 in	10.2 oz	Halfway point! Taste buds active
22	Papaya	7.6 in	15.2 oz	Grip is strong, eyebrows form
24	Ear of corn	8.5 in	1.3 lbs	Lungs developing, viability milestone
26	Zucchini	9.2 in	1.7 lbs	Eyes open, can respond to sound

Week	Baby Size	Length	Weight	Key Development
28	Eggplant	10 in	2.2 lbs	Can blink, dream (REM sleep)
30	Cabbage	10.8 in	2.9 lbs	Brain growing rapidly
32	Squash	11.4 in	3.7 lbs	Practicing breathing, toenails
34	Cantaloupe	12 in	4.7 lbs	Lungs nearly mature
36	Honeydew	13.2 in	5.8 lbs	Dropping into birth position
37	Winter melon	13.6 in	6.3 lbs	Full term! Organs ready
38	Pumpkin	13.8 in	6.8 lbs	Brain & lungs maturing
39	Small watermelon	14 in	7.3 lbs	Building fat layer, ready for birth
40	Watermelon	14.2 in	7.6 lbs	Due date! Ready to meet world

📅 Track Your Dates: Use our Pregnancy Due Date Calculator to find your estimated delivery date, and our Pregnancy Weight Gain Calculator to track healthy weight gain throughout your pregnancy.

When	Test / Milestone
Week 6-8	First ultrasound, confirm heartbeat
Week 10-13	NIPT / first trimester screening
Week 12	NT scan (nuchal translucency)
Week 18-22	Anatomy scan (gender reveal possible)
Week 24-28	Glucose tolerance test
Week 28	Rh antibody screening
Week 35-37	Group B strep test
Week 37	Considered full term
Week 39-40	Due date — baby's arrival!