What Happens During Ovarian Stimulation?
For women undergoing in vitro fertilization (IVF), ovarian stimulation marks the first active phase of treatment. Fertility medications are used to encourage the ovaries to produce multiple eggs in a single cycle. By increasing the number of eggs available for retrieval, stimulation enhances the chances of successful embryo creation and implantation. Here’s everything patients need to know before beginning ovarian stimulation during IVF.
Medications used for stimulation
During IVF, fertility medications are used to promote follicle growth and regulate hormones. Most women undergoing treatment are given injectable gonadotropins to stimulate the ovaries to mature multiple follicles simultaneously. The patient is closely monitored during this phase of the cycle, so the fertility team can adjust the medication dose if needed to achieve an optimal response. Additional medications may be used to prevent premature ovulation during the cycle, allowing eggs to be collected at an optimal time. A trigger injection prepares the eggs for final maturation before retrieval. Protocols vary based on age, hormone levels, and ovarian reserve.
Frequent appointments
During an IVF cycle, patients are seen frequently to track medication response and follicle development. Blood tests measure hormone levels, such as estrogen, during the stimulation phase. Ultrasound is used to assess follicle size and count within the ovaries. Appointments typically occur every few days during this phase of treatment. While having to be in the fertility clinic so frequently can feel overwhelming, many patients consider these frequent appointments a good opportunity to ask questions and stay informed about every step of treatment.
Your body on stims
In vitro fertilization can be difficult both physically and emotionally. During ovarian stimulation, abdominal bloating and mild discomfort can occur due to enlarged ovaries. Hormonal shifts during the cycle can influence the patient’s mood, energy levels, and sleep patterns. Injection site reactions sometimes include redness or tenderness. For women with a needle phobia, stimulation can be particularly difficult. Emotional fluctuations can also occur during treatment, with many couples experiencing elation, stress, optimism, anxiety, joy, sadness, and disappointment all within a single cycle.
Optimal timing
Stimulation usually lasts 8-14 days, depending on the individual’s response to the medication. Follicles must reach an optimal size, typically detected by ultrasound, before a patient can be scheduled for an egg retrieval. Once the doctor has determined that the follicles are mature, a trigger shot is given to initiate ovulation at a precise time for optimal egg collection. Retrieval occurs under light sedation using ultrasound-guided techniques and is generally painless. Once retrieved, eggs are combined with sperm in the lab to create embryos, which can then be implanted into the uterus or stored for future use.
A clearer path forward
Understanding ovarian stimulation helps build confidence during IVF treatment. Before starting stimulation, women should understand planned medication protocols, when and how ovulatory stimulant medication may be adjusted, monitoring requirements, and when retrieval is expected. Working with a trusted fertility team can help the process run smoothly and safely.
