Due or born in March: when was the baby conceived?
A baby due in March was most likely conceived between 8 June and 8 July of the year before.
For a baby born in March at full term, from 37 to 42 weeks, conception was most likely between 25 May and 29 July of the year before.
Most likely conception date
Enter a date to see when conception most likely happened.
Not medical advice. Every pregnancy is different: ask your midwife or doctor about yours.
Conception date for each day in March
| Due date or birthday | Conception, for a due date | Conception, for a birth at 37 to 42 weeks |
|---|---|---|
| 1 March | 8 June | 25 May to 29 June |
| 2 March | 9 June | 26 May to 30 June |
| 3 March | 10 June | 27 May to 1 July |
| 4 March | 11 June | 28 May to 2 July |
| 5 March | 12 June | 29 May to 3 July |
| 6 March | 13 June | 30 May to 4 July |
| 7 March | 14 June | 31 May to 5 July |
| 8 March | 15 June | 1 June to 6 July |
| 9 March | 16 June | 2 June to 7 July |
| 10 March | 17 June | 3 June to 8 July |
| 11 March | 18 June | 4 June to 9 July |
| 12 March | 19 June | 5 June to 10 July |
| 13 March | 20 June | 6 June to 11 July |
| 14 March | 21 June | 7 June to 12 July |
| 15 March | 22 June | 8 June to 13 July |
| 16 March | 23 June | 9 June to 14 July |
| 17 March | 24 June | 10 June to 15 July |
| 18 March | 25 June | 11 June to 16 July |
| 19 March | 26 June | 12 June to 17 July |
| 20 March | 27 June | 13 June to 18 July |
| 21 March | 28 June | 14 June to 19 July |
| 22 March | 29 June | 15 June to 20 July |
| 23 March | 30 June | 16 June to 21 July |
| 24 March | 1 July | 17 June to 22 July |
| 25 March | 2 July | 18 June to 23 July |
| 26 March | 3 July | 19 June to 24 July |
| 27 March | 4 July | 20 June to 25 July |
| 28 March | 5 July | 21 June to 26 July |
| 29 March | 6 July | 22 June to 27 July |
| 30 March | 7 July | 23 June to 28 July |
| 31 March | 8 July | 24 June to 29 July |
In a leap year, the date moves by one day when 29 February falls between conception and the due date or birth.
Frequently asked questions
If our baby is due in March, when did we conceive?
A baby due in March was most likely conceived between 8 June and 8 July of the year before. That is 38 weeks (266 days) before the due date. The table on this page gives the date for each due date in the month.
Born in March: when was the baby conceived?
For a baby born in March at full term, from 37 to 42 weeks, conception was most likely between 25 May and 29 July of the year before. For a birth at exactly 40 weeks, it is the same date as for a due date that day.
Can a conception date settle a paternity question?
No. This is the textbook estimate. It cannot know your cycle, when you actually ovulated or how the pregnancy was dated, and it is not precise enough to tell apart two dates a few days apart.