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Suddenly Shorter Luteal Phase

Hi, I am 25 years old and my husband is 32, we have been trying to conceive for the past 4 months and neither of us have any known fertility conditions.

I have been BBT and CM charting all along the way and also using LH ovulation tests and have consistently had a 15 day luteal phase each month (regardless of the 33-36 day cycle length). This month, however, I had a second temperature spike at 10 dpo that remained elevated for one additional day, followed by a sudden drop (Way below coverline) at 12 dpo accompanied by a sudden heavy menstrual cycle the same day.

This really caught me off guard because with the 2nd temperature spike I had some mild cramping and became excited that I was possibly experiencing implantation, completely unaware that I was about to start.

My question is does this signal a possible miscarriage?

Or is it a symptom of infertility?

Any response is appreciated:)


Both those hypotheses are possible, but my feeling is that you had a miscarriage. A second spike in temperature 10 dpo indicates that the temperature was going triphasic, which is typical of pregnancy. The sudden temperature drop followed by heavy menses also supports this possibility. Of course you will never know for sure and you should not concern yourself with this incidence.

In fact, most women who are not charting would not have even noticed.

This is a normal occurrence and it happens often. In fact, each month you
have only 30% chances of conceiving even when everything is fine.

A sudden drop in estrogen and progesterone is what triggers the menstrual cycle. In some cases the production of progesterone during the second phase of the menstrual cycle is not strong enough to support embryo implantation. The fact that your cycles are 33-36 with a 15 days long luteal phase indicates that you ovulate later than day 14 indicating and imbalance between the follicular (first half of the menstrual cycle) and the luteal phase (second half of the menstrual cycle).

This often correlates with estrogen levels higher than progesterone levels. Of course this is just a theory; your doctor can only properly diagnose this imbalance if present.

I say this because it is very common occurrence in many women these days.

The best way to correct this imbalance naturally is by following the fertility diet and by taking herbal remedies like Vitex agnus castus. Vitex stimulates the pituitary gland to produce luteininzing hormone (LH), which in turn supports the production of progesterone by the ovary during the second half of the menstrual cycle.

Vitex has been extensively studies for its ability to correct short luteal phase and increase fertility in women with irregular cycles.

Vitex also is known to prevent miscarriage.

Vitex is found in many fertility products. I would recommend taking FertilAid for women help create more balance within your menstrual cycle and your hormonal levels and FertileCM to help increase fertile mucus and support healthy embryo implantation.

Fertility Blessings!

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Comments are posted only after approval. For medical related questions, please talk to your health care practitioner. I will not answer questions on conventional fertility medications, medical test results or other. If you are taking any prescription drugs for fertility, talk to your doctor. With this website my job is to educate and support you in learning more about natural therapies that can help boost your fertility and prepare for a healthy pregnancy. Please do not submit medical tests or results. If you have questions on your fertility or medical results talk to your doctor. Those questions will not be answered. I receive a lot of submissions, so I may not be able to answer all.

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