Priming & Stimulation

Priming & Stimulation

Once your period begins, you will start daily injections for approximately 10 days to stimulate as many eggs as possible for the egg retrieval.


Normally, an individual produces one mature egg for fertilization during each menstrual cycle. In the Priming and Stimulation phases, you will be taking medications to ensure your ovaries simultaneously produce as many eggs as possible. Producing multiple eggs increases your chances of having a successful pregnancy in the future if you decide to have an IVF procedure with your frozen eggs.

Priming Phase

The purpose of the priming phase is to quiet your ovaries and get the follicles lined up at the start line for the stimulation. We want to ensure that your eggs are in a healthy environment and are all at the same stage of development when we stimulate them.


The next phase of your cycle is called the stimulation (stim) phase. Your doctor will create a cycle plan that is suited to your fertility needs. During ovarian stimulation, you will take injections that cause your ovaries to grow multiple follicles. Each follicle contains one egg. The goal of stimulation phase is to grow as many follicles as possible in order to retrieve mature eggs.

The stim phase starts on cycle day 2, 3, or 4 after your priming phase, or on day 6 after finishing the birth control pill.

Your nurse will tell you when to start injections.

Most women need 10 -12 days of stimulation injections, although some take longer before the follicles are ready for egg retrieval.

This is the busy phase of your treatment, as you will be doing injections 2-5 times per day.

We will monitor how your ovaries respond to the medications by testing your blood estrogen level. We will also be monitoring your follicle growth using ultrasound. You will have to come to the clinic between 7:30 am – 9:00 am for blood tests and ultrasounds about every 2 days. Your Olive nursing team will be sure you know the next steps to follow every time you have a blood test or ultrasound.

You can communicate with your team by phone or the e-IVF patient portal.


What You Need to Know About Egg Retrieval