By Dr. Rut Gómez de Segura (Gynaecologist – Reg. No. 28/2908776).
When an assisted reproduction treatment begins, the moment of embryo transfer is probably one of the most anticipated and emotionally intense stages. After several days of medication, medical check-ups, consultations, and tests, a new phase begins—one filled with hope, but also with uncertainty.
One of the most frequently asked questions during this period is whether sexual intercourse is allowed after the transfer and whether it can affect implantation chances in any way.
Once the embryo has been transferred to the uterus, the implantation process begins, usually within the first few days after the transfer. During this time, the embryo starts a series of highly complex interactions with the endometrium that, if everything progresses correctly, will allow it to implant and develop.
The uterus is an organ designed to protect pregnancy from its earliest stages, and normal daily activities do not cause the embryo to “detach.” However, this initial period is extremely delicate from a biological and hormonal standpoint, as any factor that disrupts uterine balance could interfere with the process.
From a strictly physiological point of view, there is no conclusive scientific evidence showing that sexual intercourse directly reduces implantation rates in uncomplicated IVF cycles. Uterine contractions associated with orgasm are physiological and, on their own, have not been shown to be strong enough to expel an embryo.
Nevertheless, despite the lack of evidence, many recommendations are based on the principle of caution, especially during such a critical period as the days following embryo transfer. For this reason, the general recommendation at IVF-Life clinics after embryo transfer is to avoid intense physical effort, extremely hot baths (such as saunas), diving or immersion baths that may increase abdominal pressure, and to refrain from sexual intercourse until the pregnancy test is performed.
This recommendation is not aimed solely at preventing implantation problems, but at improving the patient’s overall well-being and the uterine environment.
One of the reasons for this advice is that, in fresh embryo transfers following ovarian stimulation, the ovaries may remain enlarged and sensitive, making intercourse uncomfortable or even painful. In addition, sexual activity may trigger mild uterine contractions or pelvic discomfort which, although not necessarily harmful, are best avoided during this particularly sensitive period.
In some cases, minor spotting or discharge may occur, causing unnecessary anxiety during the two-week wait. Reducing external factors helps provide the embryo with the most stable environment possible during its first days.
Therefore, the recommendation of temporary sexual abstinence should not be interpreted as a strict prohibition due to imminent danger, but rather as a preventive measure to maximize the chances of treatment success.
Beyond medical considerations, the period after embryo transfer is often marked by intense emotional strain. These days are commonly known as the “two-week wait” and may lead to anxiety, fear, or even excessive restrictions on daily life.
For this reason, maintaining emotional intimacy as a couple can be beneficial. Emotional closeness, mutual support, and affectionate contact can be very positive during this time, without creating additional pressure or feelings of guilt.

After embryo transfer, recommendations usually focus on maintaining a normal lifestyle, avoiding only very specific situations. In general, it is advised to:
Embryo implantation is a highly complex process involving multiple factors related to the embryo, the uterus, and the woman’s hormonal balance. Although it is common to look for a single cause when implantation fails, the reality is that it usually results from a combination of elements that must be perfectly synchronized.