Starting from the menstrual cycle day 2 the woman begins to inject a FSH-containing medicinal product. The average duration of stimulation is 10 days, but it can last between 7 to 14 or more days. Ovarian response to hormonal stimulation is individual, so the dose and duration of stimulation for every woman is determined individually. Follicular growth is monitored by ultrasound on average 3 times during stimulation. Your doctor will determine how many follicles are growing in each ovary and what their growth dynamics are compared to the previous visit. Women are trained on how to perform the injections.
The doctor will prescribe hormone tests to more accurately control the ovarian response to the stimulation and determine the egg extraction date.
On average, in 5 to 10% of cases the ovarian response to stimulation is weak or very weak. If the ovarian response is very weak and the ovaries mature less than 3 follicles or no follicle at all, the IVF cycle can be interrupted. In this situation, our doctor will explain the causes of the situation and plans for further action.
Up to 5% of cases may develop ovarian hyperstimulation syndrome (OHSS). Many follicles are formed, so the ovaries increase in size, the belly becomes easily inflated and sensitive and fluid can accumulate in the abdominal cavity. If you are at a high risk of OHSS, your doctor will make recommendations for during stimulation apply special prevention and stimulation tactics to reduce the risk of OHSS as much as possible.