Ovulation worksheet

1. Estimated ovulation day: Wednesday, Apr 29, 2026

1. Ovulation usually comes about 16 days before your next period. So take 16 days off your cycle length

   $28-16$$=12\text{\hspace{0.17em}days}$

2. Count that many days on from the first day of your last period to find your ovulation day

   $\text{Apr 17, 2026}\text{+}12\text{\hspace{0.17em}days}$$=\text{Wednesday, Apr 29, 2026}$

3. Your fertile window is the 5 days before ovulation plus ovulation day, because sperm can live for several days

   $\text{Apr 29, 2026}\text{−}5\text{\hspace{0.17em}days}$$=\text{Apr 24, 2026 – Apr 29, 2026}$

4. Your most fertile days are the 2 days before ovulation plus ovulation day

   $\text{Apr 29, 2026}\text{−}2\text{\hspace{0.17em}days}$$=\text{Apr 27, 2026 – Apr 29, 2026}$

5. Your next period should start one full cycle after your last one began

   $\text{Apr 17, 2026}\text{+}28\text{\hspace{0.17em}days}$$=\text{Friday, May 15, 2026}$

6. If you got pregnant around ovulation this cycle, the baby would be due about 266 days later

   $\text{Apr 29, 2026}\text{+}266\text{\hspace{0.17em}days}$$=\text{Jan 20, 2027}$

7. Add 28 days again for each cycle after that

   $28+28$$=56\text{\hspace{0.17em}days}$

2. Estimated ovulation day: Thursday, Oct 30, 2025

1. Ovulation usually comes about 12 days before your next period. So take 12 days off your cycle length

   $22-12$$=10\text{\hspace{0.17em}days}$

2. Count that many days on from the first day of your last period to find your ovulation day

   $\text{Oct 20, 2025}\text{+}10\text{\hspace{0.17em}days}$$=\text{Thursday, Oct 30, 2025}$

3. Your fertile window is the 5 days before ovulation plus ovulation day, because sperm can live for several days

   $\text{Oct 30, 2025}\text{−}5\text{\hspace{0.17em}days}$$=\text{Oct 25, 2025 – Oct 30, 2025}$

4. Your most fertile days are the 2 days before ovulation plus ovulation day

   $\text{Oct 30, 2025}\text{−}2\text{\hspace{0.17em}days}$$=\text{Oct 28, 2025 – Oct 30, 2025}$

5. Your next period should start one full cycle after your last one began

   $\text{Oct 20, 2025}\text{+}22\text{\hspace{0.17em}days}$$=\text{Tuesday, Nov 11, 2025}$

6. If you got pregnant around ovulation this cycle, the baby would be due about 266 days later

   $\text{Oct 30, 2025}\text{+}266\text{\hspace{0.17em}days}$$=\text{Jul 23, 2026}$

7. Add 22 days again for each cycle after that

   $22+22$$=44\text{\hspace{0.17em}days}$

3. Estimated ovulation day: Tuesday, Aug 5, 2025

1. Ovulation usually comes about 17 days before your next period. So take 17 days off your cycle length

   $28-17$$=11\text{\hspace{0.17em}days}$

2. Count that many days on from the first day of your last period to find your ovulation day

   $\text{Jul 25, 2025}\text{+}11\text{\hspace{0.17em}days}$$=\text{Tuesday, Aug 5, 2025}$

3. Your fertile window is the 5 days before ovulation plus ovulation day, because sperm can live for several days

   $\text{Aug 5, 2025}\text{−}5\text{\hspace{0.17em}days}$$=\text{Jul 31, 2025 – Aug 5, 2025}$

4. Your most fertile days are the 2 days before ovulation plus ovulation day

   $\text{Aug 5, 2025}\text{−}2\text{\hspace{0.17em}days}$$=\text{Aug 3, 2025 – Aug 5, 2025}$

5. Your next period should start one full cycle after your last one began

   $\text{Jul 25, 2025}\text{+}28\text{\hspace{0.17em}days}$$=\text{Friday, Aug 22, 2025}$

6. If you got pregnant around ovulation this cycle, the baby would be due about 266 days later

   $\text{Aug 5, 2025}\text{+}266\text{\hspace{0.17em}days}$$=\text{Apr 28, 2026}$

7. Add 28 days again for each cycle after that

   $28+28$$=56\text{\hspace{0.17em}days}$

4. Estimated ovulation day: Sunday, Aug 24, 2025

1. Ovulation usually comes about 15 days before your next period. So take 15 days off your cycle length

   $22-15$$=7\text{\hspace{0.17em}days}$

2. Count that many days on from the first day of your last period to find your ovulation day

   $\text{Aug 17, 2025}\text{+}7\text{\hspace{0.17em}days}$$=\text{Sunday, Aug 24, 2025}$

3. Your fertile window is the 5 days before ovulation plus ovulation day, because sperm can live for several days

   $\text{Aug 24, 2025}\text{−}5\text{\hspace{0.17em}days}$$=\text{Aug 19, 2025 – Aug 24, 2025}$

4. Your most fertile days are the 2 days before ovulation plus ovulation day

   $\text{Aug 24, 2025}\text{−}2\text{\hspace{0.17em}days}$$=\text{Aug 22, 2025 – Aug 24, 2025}$

5. Your next period should start one full cycle after your last one began

   $\text{Aug 17, 2025}\text{+}22\text{\hspace{0.17em}days}$$=\text{Monday, Sep 8, 2025}$

6. If you got pregnant around ovulation this cycle, the baby would be due about 266 days later

   $\text{Aug 24, 2025}\text{+}266\text{\hspace{0.17em}days}$$=\text{May 17, 2026}$

7. Add 22 days again for each cycle after that

   $22+22$$=44\text{\hspace{0.17em}days}$

5. Estimated ovulation day: Monday, Jul 13, 2026

1. Ovulation usually comes about 12 days before your next period. So take 12 days off your cycle length

   $26-12$$=14\text{\hspace{0.17em}days}$

2. Count that many days on from the first day of your last period to find your ovulation day

   $\text{Jun 29, 2026}\text{+}14\text{\hspace{0.17em}days}$$=\text{Monday, Jul 13, 2026}$

3. Your fertile window is the 5 days before ovulation plus ovulation day, because sperm can live for several days

   $\text{Jul 13, 2026}\text{−}5\text{\hspace{0.17em}days}$$=\text{Jul 8, 2026 – Jul 13, 2026}$

4. Your most fertile days are the 2 days before ovulation plus ovulation day

   $\text{Jul 13, 2026}\text{−}2\text{\hspace{0.17em}days}$$=\text{Jul 11, 2026 – Jul 13, 2026}$

5. Your next period should start one full cycle after your last one began

   $\text{Jun 29, 2026}\text{+}26\text{\hspace{0.17em}days}$$=\text{Saturday, Jul 25, 2026}$

6. If you got pregnant around ovulation this cycle, the baby would be due about 266 days later

   $\text{Jul 13, 2026}\text{+}266\text{\hspace{0.17em}days}$$=\text{Apr 5, 2027}$

7. Add 26 days again for each cycle after that

   $26+26$$=52\text{\hspace{0.17em}days}$

6. Estimated ovulation day: Monday, Aug 18, 2025

1. Ovulation usually comes about 14 days before your next period. So take 14 days off your cycle length

   $38-14$$=24\text{\hspace{0.17em}days}$

2. Count that many days on from the first day of your last period to find your ovulation day

   $\text{Jul 25, 2025}\text{+}24\text{\hspace{0.17em}days}$$=\text{Monday, Aug 18, 2025}$

3. Your fertile window is the 5 days before ovulation plus ovulation day, because sperm can live for several days

   $\text{Aug 18, 2025}\text{−}5\text{\hspace{0.17em}days}$$=\text{Aug 13, 2025 – Aug 18, 2025}$

4. Your most fertile days are the 2 days before ovulation plus ovulation day

   $\text{Aug 18, 2025}\text{−}2\text{\hspace{0.17em}days}$$=\text{Aug 16, 2025 – Aug 18, 2025}$

5. Your next period should start one full cycle after your last one began

   $\text{Jul 25, 2025}\text{+}38\text{\hspace{0.17em}days}$$=\text{Monday, Sep 1, 2025}$

6. If you got pregnant around ovulation this cycle, the baby would be due about 266 days later

   $\text{Aug 18, 2025}\text{+}266\text{\hspace{0.17em}days}$$=\text{May 11, 2026}$

7. Add 38 days again for each cycle after that

   $38+38$$=76\text{\hspace{0.17em}days}$

7. Estimated ovulation day: Sunday, Nov 2, 2025

1. Ovulation usually comes about 13 days before your next period. So take 13 days off your cycle length

   $28-13$$=15\text{\hspace{0.17em}days}$

2. Count that many days on from the first day of your last period to find your ovulation day

   $\text{Oct 18, 2025}\text{+}15\text{\hspace{0.17em}days}$$=\text{Sunday, Nov 2, 2025}$

3. Your fertile window is the 5 days before ovulation plus ovulation day, because sperm can live for several days

   $\text{Nov 2, 2025}\text{−}5\text{\hspace{0.17em}days}$$=\text{Oct 28, 2025 – Nov 2, 2025}$

4. Your most fertile days are the 2 days before ovulation plus ovulation day

   $\text{Nov 2, 2025}\text{−}2\text{\hspace{0.17em}days}$$=\text{Oct 31, 2025 – Nov 2, 2025}$

5. Your next period should start one full cycle after your last one began

   $\text{Oct 18, 2025}\text{+}28\text{\hspace{0.17em}days}$$=\text{Saturday, Nov 15, 2025}$

6. If you got pregnant around ovulation this cycle, the baby would be due about 266 days later

   $\text{Nov 2, 2025}\text{+}266\text{\hspace{0.17em}days}$$=\text{Jul 26, 2026}$

7. Add 28 days again for each cycle after that

   $28+28$$=56\text{\hspace{0.17em}days}$

8. Estimated ovulation day: Thursday, Apr 10, 2025

1. Ovulation usually comes about 13 days before your next period. So take 13 days off your cycle length

   $28-13$$=15\text{\hspace{0.17em}days}$

2. Count that many days on from the first day of your last period to find your ovulation day

   $\text{Mar 26, 2025}\text{+}15\text{\hspace{0.17em}days}$$=\text{Thursday, Apr 10, 2025}$

3. Your fertile window is the 5 days before ovulation plus ovulation day, because sperm can live for several days

   $\text{Apr 10, 2025}\text{−}5\text{\hspace{0.17em}days}$$=\text{Apr 5, 2025 – Apr 10, 2025}$

4. Your most fertile days are the 2 days before ovulation plus ovulation day

   $\text{Apr 10, 2025}\text{−}2\text{\hspace{0.17em}days}$$=\text{Apr 8, 2025 – Apr 10, 2025}$

5. Your next period should start one full cycle after your last one began

   $\text{Mar 26, 2025}\text{+}28\text{\hspace{0.17em}days}$$=\text{Wednesday, Apr 23, 2025}$

6. If you got pregnant around ovulation this cycle, the baby would be due about 266 days later

   $\text{Apr 10, 2025}\text{+}266\text{\hspace{0.17em}days}$$=\text{Jan 1, 2026}$

7. Add 28 days again for each cycle after that

   $28+28$$=56\text{\hspace{0.17em}days}$

9. Estimated ovulation day: Friday, Jun 6, 2025

1. Ovulation usually comes about 16 days before your next period. So take 16 days off your cycle length

   $34-16$$=18\text{\hspace{0.17em}days}$

2. Count that many days on from the first day of your last period to find your ovulation day

   $\text{May 19, 2025}\text{+}18\text{\hspace{0.17em}days}$$=\text{Friday, Jun 6, 2025}$

3. Your fertile window is the 5 days before ovulation plus ovulation day, because sperm can live for several days

   $\text{Jun 6, 2025}\text{−}5\text{\hspace{0.17em}days}$$=\text{Jun 1, 2025 – Jun 6, 2025}$

4. Your most fertile days are the 2 days before ovulation plus ovulation day

   $\text{Jun 6, 2025}\text{−}2\text{\hspace{0.17em}days}$$=\text{Jun 4, 2025 – Jun 6, 2025}$

5. Your next period should start one full cycle after your last one began

   $\text{May 19, 2025}\text{+}34\text{\hspace{0.17em}days}$$=\text{Sunday, Jun 22, 2025}$

6. If you got pregnant around ovulation this cycle, the baby would be due about 266 days later

   $\text{Jun 6, 2025}\text{+}266\text{\hspace{0.17em}days}$$=\text{Feb 27, 2026}$

7. Add 34 days again for each cycle after that

   $34+34$$=68\text{\hspace{0.17em}days}$

10. Estimated ovulation day: Monday, Mar 3, 2025

1. Ovulation usually comes about 15 days before your next period. So take 15 days off your cycle length

   $32-15$$=17\text{\hspace{0.17em}days}$

2. Count that many days on from the first day of your last period to find your ovulation day

   $\text{Feb 14, 2025}\text{+}17\text{\hspace{0.17em}days}$$=\text{Monday, Mar 3, 2025}$

3. Your fertile window is the 5 days before ovulation plus ovulation day, because sperm can live for several days

   $\text{Mar 3, 2025}\text{−}5\text{\hspace{0.17em}days}$$=\text{Feb 26, 2025 – Mar 3, 2025}$

4. Your most fertile days are the 2 days before ovulation plus ovulation day

   $\text{Mar 3, 2025}\text{−}2\text{\hspace{0.17em}days}$$=\text{Mar 1, 2025 – Mar 3, 2025}$

5. Your next period should start one full cycle after your last one began

   $\text{Feb 14, 2025}\text{+}32\text{\hspace{0.17em}days}$$=\text{Tuesday, Mar 18, 2025}$

6. If you got pregnant around ovulation this cycle, the baby would be due about 266 days later

   $\text{Mar 3, 2025}\text{+}266\text{\hspace{0.17em}days}$$=\text{Nov 24, 2025}$

7. Add 32 days again for each cycle after that

   $32+32$$=64\text{\hspace{0.17em}days}$