Your Baby's
Due Date

September 21, 2025



You Are

16 weeks
and 3 days

Your Progress

41%

Baby is due in

23 weeks
and 4 days



September 21, 2025

is a Sunday


LMP/Start Date: Dec 15, 2024

Change due date

Key Developments

Estimated Conception:
December 29, 2024
+ Pregnancy Test:
January 12, 2025
Estimated First Heart Beat:
January 22, 2025
Estimated Due Date:
September 21, 2025

How Many Weeks Am I?

You are 16 weeks and 3 days
Get a full report here!

Announcement Image

Due Date: September 21 - Announcement Image

Birthday Signs

Baby's star sign is Virgo

Birthstone: Sapphire
Birth Flower: Aster or Morning Glory
Birthstone Color: Deep, Blue

Trimester Dates

Trimester One:
Dec 15, 2024 - Mar 22, 2025
0 - 13 Weeks
Trimester Two:
Mar 23, 2025 - Jun 28, 2025
14 - 27 Weeks
Trimester Three:
Jun 29, 2025 - Sep 21, 2025
28 - 40 Weeks

Months Timeline

1 Month PregnantJan 15, 2025
2 Months PregnantFeb 15, 2025
3 Months PregnantMar 15, 2025
4 Months PregnantApr 15, 2025
5 Months PregnantMay 15, 2025
6 Months PregnantJun 15, 2025
7 Months PregnantJul 15, 2025
8 Months PregnantAug 15, 2025
9 Months PregnantSep 15, 2025
Due Date: September 21, 2025
Due Date in September - Announcement Image

Date

How Often to Visit Doctor[1]

Jan 12 - Jun 29 Once a month during this time
Jun 29 - Aug 24 Twice per month during this time
Aug 24 - Sep 21 Once per week during this time

Prenatal Testing Dates[2]

Prenatal testing dates for due date Sep 21, 2025. Prenatal testing is available in most pregnancies and can involve ultrasounds, blood tests and samples. Always use your doctors recommended dates over dates found here.
Early Ultrasound Scan:
Feb 9, 2025 to Mar 16, 2025
7 to 13 weeks
First Trimester Screening or Nuchal Translucency Scan (Blood Test and Ultrasound):
Mar 2, 2025 to Mar 16, 2025
11 to 13 weeks
Quad Screen (Blood Test):
Mar 30, 2025 to May 4, 2025
15 to 20 weeks
Second Trimester Ultrasound or Anomaly Scan:
Apr 20, 2025 to May 11, 2025
18 to 21 weeks
Glucose Challenge Screening (Blood Test):
Jun 1, 2025 to Jun 29, 2025
24 to 28 weeks

Your Firsts

First missed periodJan 12 4 Weeks
Baby's heart beat heardMar 09 16 Weeks
Belly definitely showingApr 0616-18 Weeks
Baby kicks felt, second or later babiesApr 2018-20 Weeks
Friends and family may feel baby moveJul 2031 Weeks

Baby's Developments

Conception is most likely on this date Dec 29 2 Weeks
First heart beat Jan 22 5 Weeks
Major organs have formed and face is slowly forming Feb 23 10 Weeks
Miscarriage risk decreases Mar 9 12 Weeks
Your baby can see light through their closed eyelids Mar 30 15 Weeks
You may be able to feel your baby move now Apr 6 16 Weeks
Your baby can now hear sounds Apr 27 19 Weeks
Third trimester, baby is "practice breathing" Jun 29 28 Weeks
Eyelashes, fingernails, and toenails have now formed Jul 27 32 Weeks

Things to Consider

Start planning maternity leave and postpartum work schedule. Tell boss about pregnancyMar 912 Weeks
Popular time to tell friends and familyMar 912 Weeks
Start pediatrician interviewsMay 420 Weeks
Good time to look into birthing classes for first pregnanciesMay 1121 Weeks
If banking cord blood, find facility and order kitMay 1822 Weeks
Decide whether you want a birthing coach or doula. Start interviewingJun 2928 Weeks
Have your baby shower anytime from nowJul 1330 Weeks
Good time to take birthing classesJul 13 30 Weeks
Popular time to have your last day of workAug 2436 Weeks
Have your pediatrician chosen ready for baby after birthAug 2436 Weeks
Plan who you want to keep in the loop when you go into laborAug 24 36 Weeks
Learn the symptoms of laborAug 2436 Weeks

When is my Baby Premature, Full Term or Late Term?[2]

Babies born now are considered Extremely PrematureJun 825 Weeks
Babies born now are considered Moderately PrematureJul 629 Weeks
Babies born now are considered Mildly PrematureAug 333 Weeks
Babies born now are considered Early Term Aug 31 37 Weeks
Babies born now are considered Full Term Sep 14 39 Weeks
Babies born now are considered Late Term Sep 28 41 Weeks
Babies born now are considered Post Term Oct 5 42+ Weeks

Most Probable Due Range

September 2025
SMTWTFS
 1
Early Term
2
Early Term
3
Early Term
4
Early Term
5
Early Term
6
Early Term
7
Early Term
8
Early Term
9
Early Term
10
Early Term
11
Early Term
12
Early Term
13
Early Term
14
Full Term
15
Full Term
16
Full Term
17
Full Term
18
Full Term
19
Full Term
20
Full Term
21
Full Term
22
Full Term
23
Full Term
24
Full Term
25
Full Term
26
Full Term
27
Full Term
28
Late Term
29
Late Term
30
Late Term
 

October 2025
SMTWTFS
 1
Late Term
2
Late Term
3
Late Term
4
Late Term
567891011
12131415161718
19202122232425
262728293031 

Imagine

First footsteps in September 21, 2026 (1 year)
Start kindergarten in September 21, 2030 (5 years)
Start high school in September 21, 2039 (14 years)
Start to drive in September 21, 2041 (16 years)
Finish high school in September 21, 2043 (18 years)
Graduate from college in 2048 (23 years)

Important Birthdays

First Birthday: September 21, 2026
5th Birthday: September 21, 2030
Sweet 16: September 21, 2041
21st Birthday: September 21, 2046
50th Birthday: September 21, 2075

What if My Due Date September 21, Has Changed?[3]

Your due date September 21st, 2025 could be changed if there is a significant difference between the due date based on ultrasound and the due date calculated from your LMP (September 21, 2025) date.

The American College of Obstetricians and Gynecologists, the American Institute of Ultrasound in Medicine, and the Society for Maternal-Fetal Medicine have produced guidelines to help doctors decide when to change due dates. See chart here.

References:

  1. Prenatal Care Fact Sheet. http://womenshealth.gov/publications/our-publications/fact-sheet/prenatal-care.html
  2. Prenatal care and tests. Office on Women's Health (OWH) GOV - https://www.womenshealth.gov/pregnancy/youre-pregnant-now-what/prenatal-care-and-tests
  3. Committee Opinion No. 579. 2013. Definition of term pregnancy. Obstet Gynec. 122 (2013): 1139-40. doi: 10.1097/01.AOG.0000437385.88715.4a
  4. Committee Opinion No. 611. Method for estimating due date. Obstet Gynec. 124 (2014): 863-6. doi: 10.1097/01.AOG.0000454932.15177.be