GLP-1 and PCOS: Cycle Changes to Track and Discuss

Write down the first day of bleeding, the last day, and how heavy it is each day. Note spotting, clots, and whether bleeding is lighter or heavier than your usual. Track cycle length (days from one period start to the next). A simple notes app works, but a paper calendar is fine too.

If you use ovulation tests or basal body temperature, record results and dates to see if ovulation timing is shifting. Also log acne, hair growth, scalp hair shedding, pelvic pain, headaches, and mood changes. With PCOS, changes may show up first as symptom shifts, not perfectly regular periods. Bring this symptom list to visits so your clinician can look for patterns over time.

Write down the exact medicine name, your injection day (if you inject), and the date you started and each time your dose changed. Include missed doses, delays, or side effects like nausea, vomiting, constipation, or low appetite. Also note big changes in sleep, stress, exercise, and weight trend, since these can affect cycles too. If you take an oral GLP-1 pill, record how you take it each day (timing and whether you follow the label instructions).

Call your clinician promptly if you have very heavy bleeding (soaking through protection quickly), bleeding that lasts much longer than your normal, new severe pelvic pain, dizziness, fainting, or signs of anemia like unusual shortness of breath or chest pounding. If you could be pregnant, take a pregnancy test and contact your prescriber, since GLP-1 medicines are generally not recommended during pregnancy. Ongoing spotting or bleeding between periods is also worth a check-in, especially if it is new for you. This is not about panic—it is about ruling out problems early.

If pregnancy is possible for you, talk with your prescriber or OB-GYN about a plan before you start a GLP-1 or adjust doses. Tirzepatide (Mounjaro/Zepbound) can reduce oral contraceptive absorption around starts and dose increases, so this is an important conversation for people using the pill. If you have questions about breastfeeding, fertility, contraception, or hormone therapy, route them to your prescriber or OB-GYN. Do not rely on social media rules of thumb for this topic.

If you use a compounded version, keep the pharmacy name, lot number, concentration, and dosing instructions in your notes. Cycle changes can be hard to interpret if the product, strength, or weekly amount varies from month to month. Do not buy “research” peptides or products sold online as GLP-1s without a prescription, since those are not the same as regulated medicines. If you want to switch from compounded to an FDA-approved option (including the newer GLP-1 pills), ask your prescriber to help you compare choices and availability.