Ovulation inducer capsules, typically containing 500mg of the active substance, are used in the treatment of certain fertility issues in women. These medications work by stimulating ovulation, which is the process where the ovary releases an egg. This can be beneficial for women who have irregular ovulation or anovulation (no ovulation).

The most common active ingredients in ovulation inducer medications include:

1. Clomiphene Citrate (Clomid, Serophene): This is a non-steroidal fertility medicine that causes the pituitary gland to release hormones needed to stimulate ovulation. Clomiphene is usually taken in smaller doses than 500mg, often in the range of 50mg to 150mg per day for 5 days during the menstrual cycle.

2. Letrozole (Femara): Originally developed as a breast cancer treatment, Letrozole has also been used as an off-label medication to induce ovulation. It works by reducing estrogen levels and thereby stimulating follicular development. Like Clomiphene, Letrozole is typically prescribed in smaller doses, such as 2.5mg to 5mg per day for 5 days.

3. Metformin: While not a direct ovulation inducer, Metformin is often prescribed to women with polycystic ovary syndrome (PCOS) to improve insulin resistance, which can in turn help in restoring regular ovulation. Doses can vary widely depending on the individual's condition and treatment plan.

If you are referring to a specific 500mg ovulation inducer capsule, it's important to clarify the active ingredient, as the dosage seems unusually high for the commonly used medications mentioned above. Always follow the guidance of a healthcare professional who can provide personalized advice and dosage instructions based on your health condition.

Remember, while ovulation inducers can be effective in helping achieve pregnancy, they may also increase the likelihood of multiple pregnancies (twins, triplets, etc.) and have various side effects. Therefore, close monitoring by a healthcare provider is essential during treatment.