Calculate the expected number of days to give birth from the date of the last menstrual period.

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## Due date calculator

## Due date calculator

Assuming the first day of the last menstrual period as day 0 and the gestational age as 40 weeks (280 days), calculate the expected delivery date.

It also displays the number of weeks pregnant as of today.

## Course of pregnancy

### Gestation period

Pregnancy period is counted as 1 month from 0th week to 3rd week, 2nd month from 4th week to 7th week, and so on.

The 1st to 4th month of pregnancy is called the early stage of pregnancy, the 5th to 7th month of pregnancy is called the middle stage of pregnancy, and the 8th month and beyond is called the third stage of pregnancy.

### Time of birth

A full-term birth is defined as a birth between 37 weeks 0 days and 41 weeks 6 days of gestation.

Fetuses born at this time are fully mature and therefore the best time to give birth safely.

A premature birth is defined as a birth between 22 weeks 0 days and 36 weeks 6 days of gestation, which is earlier than a full-term birth.

Fetuses born during this period are more likely to develop physical disabilities.

If the pregnancy is less than 22 weeks, it is called a miscarriage and it is almost impossible for the fetus to survive.

Anything after 42 weeks 0 days is called postterm.

An oversized fetus or a malfunctioning placenta increases the risk of fetal harm.

Period | Months of pregnancy | Weeks of pregnancy | |
---|---|---|---|

Early stage | 1 months pregnant | 0 | Start of last menstrual period |

1 | |||

2 | |||

3 | |||

2 months pregnant | 4 | ||

5 | |||

6 | |||

7 | |||

3 months pregnant | 8 | ||

9 | |||

10 | |||

11 | |||

4 months pregnant | 12 | ||

13 | |||

14 | |||

15 | |||

Middle stage | 5 months pregnant | 16 | |

17 | |||

18 | |||

19 | |||

6 months pregnant | 20 | ||

21 | |||

22 | Premature birth | ||

23 | |||

7 months pregnant | 24 | ||

25 | |||

26 | |||

27 | |||

Late stage | 8 months pregnant | 28 | |

29 | |||

30 | |||

31 | |||

9 months pregnant | 32 | ||

33 | |||

34 | |||

35 | |||

10 months pregnant | 36 | ||

37 | Full term birth | ||

38 | |||

39 | |||

11 months pregnant | 40 | ||

41 | |||

42 | Post term birth |

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