Calculators>Ovulation Calculator

Ovulation Calculator

LMP Entered: 3/17/2021. Change date

Predicted Ovulation

Wednesday
Mar 31, 2021


Are You Trying to Conceive?

Your Best Predicted Days
for Intercourse Are:

Friday March 26
to
Wednesday March 31

These dates are your predicted fertile days
Your predicted fertile days have
already passed!
March 2021
SuMoTuWeThFrSa
28 1 Mar 2 3 4 5 6
7 8 9 10 11 12 13
14 15 16 17
Last Period		 18 19 20
21 22 23 24 25 26
Fertile		 27
Fertile
28
Fertile		 29
Very Fertile		 30
Very Fertile		 31
Very Fertile/
Ovulation Day		1 Apr
2
3
4
5
6
7
8
9
10
 
Wed Mar 17 First Day of Period:
The first day of your last period
 
Fri Mar 26 Start of Fertile Days:
If you have intercourse during the fertile days, the sperm can be ready and waiting for the egg. Moderate chance of conceiving on your ovulation day if you have intercourse today.
 
Sat Mar 27 Moderately Fertile:
Moderate chance of conceiving on your ovulation day if you have intercourse today.
 
Sun Mar 28 Moderately Fertile:
Moderate chance of conceiving on your ovulation day if you have intercourse today.
 
Mon Mar 29 Start of Highly Fertile Days:
Very high chance of conceiving. Research shows the days shortly before ovulation are highly fertile, especially if cervical mucus is watery and stretchy, like egg white.
 
Tue Mar 30 Highly Fertile
Very high chance of conceiving. Intercourse today may result in pregnancy on your ovulation day.
 
Wed Mar 31 Ovulation, Highly Fertile:
Very high chance of conceiving. Intercourse today may result in pregnancy on this day.
 
Wed Apr 14 First missed period:
Time to take a pregnancy test, now or within the next few days.

Due Date:

If conception occurs this would likely be your due date:

Dec 22, 2021

Increase Your Chances of Detecting Ovulation


1. Mucus

Keep an eye out for changes in your mucus. Around the time of ovulation, you may notice your cervical/vaginal mucus is clear, slick and slippery, the consistency of raw egg white.

Check for Mucus Around Mon Mar 29

2. Ovulation Predictor Kit

Use an ovulation predictor kit to predict your fertile days.
Start using an Ovulation Test Kit Around Sat Mar 27

3. Basal Body Temperature

Record your basal body temperature (BBT) each day before getting out of bed using a BBT thermometer. After you ovulate your basal body temperature increases until your next period.

It is best to follow the specific manufacturer's instructions on when and how to use a basal body temperature kit.
Start from the first day of your Menstrual Period:
Wed Mar 17 or Wed Apr 14

4. Online Calculator

Use an app or online ovualation calculator
Do This Anytime

Did you know?

  • Ovulation varies widely. Women in one study ovulated anywhere between 8 and 60 days after the first day of their period.[2]
  • Conception occurs soon after ovulation, even if sex took place several days before.
  • It is safe to assume conception occurs on the day of ovulation.[4]
  • Your fertile window can be unpredictable, even if your cycle is regular.[2]

When to have intercourse:

  • Make sure to have intercourse regularly during the fertile window and not just the day of ovulation.[2]
  • Don't worry about limiting the frequency of intercourse during your fertile window (an old recommendation); research shows this is not necessary for most couples.[3]
  • Also have intercourse every two or three days on a regular basis and not just in your predicted fertile window. Doing this, you are highly likely to hit your fertile window, with or without knowing when it is.[2]

Caution

  • It is possible your fertile window could fall partially or completely outside the days predicted by the ovulation calculator. Calculator results are best confirmed by using additional methods of detecting ovulation, here.
  • If you do not want to become pregnant, do not rely on these dates for avoiding conception.

References:

  1. Prenatal Care Fact Sheet. http://womenshealth.gov/publications/our-publications/fact-sheet/prenatal-care.html
  2. Wilcox, A. et al. The timing of the fertile window, in the menstrual cycle: Day specific estimates from a prospective study. BMJ 321 (2000): 1259 - 1262.
  3. Wilcox, A. et al. Timing of sexual intercourse in relation to ovulation: Effects on the probability of conception, survival of the pregnancy, and sex of the baby. The New England Journal of Medicine 333 (1995): 1517 - 1521. doi: 10.1056/NEJM199512073332301
  4. A. Jukic et al. Length of human pregnancy and contributors to its natural variation. Human Reproduction 28 (2013): 2848 - 2855. doi: 10.1093/humrep/det297