Timing of Ovulation Based on Your Hormone Data
Based on your LH surge pattern peaking at 45 on CD14 at 9:30am, ovulation most likely occurred between late CD14 (evening) and early CD15, approximately 24-36 hours after your LH surge began on CD13 evening, with the egg remaining viable for 12-24 hours after release. 1
Understanding Your LH Surge Pattern
Your hormone data shows a classic LH surge progression:
- CD13 evening (6:15pm): LH 26.7 - this marks the beginning of your LH surge 1
- CD14 morning (9:30am): LH 45 - this is your LH peak 1
- CD14 evening onwards: Declining LH values (22 → 12.1) - post-ovulatory decline 2
Ovulation timing occurs 28-36 hours after the beginning of the LH rise, or 8-20 hours after the LH peak. 1 Given your LH began rising on CD13 evening and peaked CD14 morning, ovulation most likely occurred:
- 24-36 hours after CD13 6:15pm = CD14 evening through CD15 early morning
- 8-20 hours after CD14 9:30am peak = CD14 evening through CD15 morning
Supporting Evidence from Your Other Markers
Your physical symptoms and hormone patterns strongly support ovulation occurring in this timeframe:
Estrogen Pattern (E1G)
- Progressive rise: 176.2 → 215.1 → 258.6 indicates proper follicular development 3
- Peak estrogen typically occurs days 12-14, triggering the LH surge 3
- Your pattern aligns perfectly with imminent ovulation 4
Progesterone Pattern (PDG)
- CD13-14: PDG 1.6 → 1.5 (pre-ovulatory baseline) 4
- CD15: PDG 1.1 (still low, as progesterone rises 2-3 days post-ovulation) 1
- Ovulation confirmation requires PDG ≥5 µg/mL measured 7 days after suspected ovulation 5
Physical Symptoms
- EWCM on CD14: Indicates peak fertility immediately before ovulation 6
- Cramps CD14 (all day until 6pm): Periovulatory pain typically occurs within 24 hours before ovulation 6
- 2am CD15 pulling/achy cramps for one hour: This mittelschmerz pattern suggests ovulation was actively occurring 6
- CD15 symptoms (nipple sensitivity, flushed cheeks, body warmth): Post-ovulatory hormonal changes 4
Egg Viability Window
The egg remains viable for fertilization for only 12-24 hours after release. 5 This is significantly shorter than sperm survival time.
Your Optimal Fertile Window
Sperm can survive 3-5 days in fertile cervical mucus. 5 Based on your ovulation timing (late CD14/early CD15), intercourse from CD11-CD15 would have been within your fertile window, with CD13-14 being the most optimal days since sperm would already be present when the egg was released. 5
Clinical Interpretation of Your LH Surge
Your LH surge shows normal characteristics:
- Duration: Multi-day surge with clear peak is within normal range 2
- Configuration: Single clear peak on CD14 is typical 2
- Timing relationship: The 24-36 hour interval between surge onset and ovulation is standard 1, 7
Individual LH surges are extremely variable in configuration, amplitude, and duration among normally fertile women. 2 Your pattern with a clear rise, peak, and decline is consistent with normal ovulation.
Confirming Ovulation Occurred
To definitively confirm ovulation occurred this cycle:
- Check PDG levels 7 days after suspected ovulation (around CD21-22 if you ovulated CD14-15) 5
- PDG ≥5 µg/mL confirms successful ovulation 5
- Sustained PDG >5 µg/mL throughout days 7-10 post-ovulation indicates adequate luteal function 4
Your current CD15 PDG of 1.1 is expected since progesterone doesn't rise significantly until 2-3 days post-ovulation. 1