What progesterone and estradiol levels indicate ovulation?

       Ovulation is indicated when luteinizing hormone (LH) reaches 52.98 ± 24.35 IU/L and estradiol levels reach 291.08 ± 75.61 pg/mL. Details are as follows:

       First, LH peaks in the female body at approximately 52.98 ± 24.35 IU/L. This LH surge effectively alleviates the inhibitory effect of granulosa cells surrounding the follicle on follicular development. Furthermore, under the combined influence of progesterone and prostaglandins, the follicle undergoes ovulation.

       Second, estradiol is primarily secreted by granulosa cells within the follicle. Under the integrated regulatory effects of the hypothalamus, follicle-stimulating hormone (FSH), and LH, follicles grow to approximately 18 mm in diameter—signaling imminent maturation and ovulation. The peak in circulating estradiol levels triggers a corresponding surge in pituitary LH secretion, exerting a positive feedback effect.

       It is recommended to maintain a relaxed and positive mindset during the ovulatory phase. Diet-wise, consider increasing intake of foods rich in phytoestrogens—such as soybeans, soy products, and soy milk—which contain plant sterols with estrogen-like activity.