Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. Interrupted ejaculation is not a safe method of contraception so pregnancy is possible but not likely due to her hormonal contraception intake. Premature ejaculation is uncontrolled ejaculation either before or shortly after sexual penetration. It happens with minimal sexual stimulation and before the person wishes. Most cases of premature ejaculation do not have a clear cause. With sexual experience and age, men often learn to delay orgasm. Premature ejaculation may occur with a new partner. It may happen only in certain sexual situations or if it has been a long time since the last ejaculation. Psychological factors such as anxiety, guilt, or depression can also cause it. In some cases, it may be related to a medical cause such as hormonal problems, injury, or a side effect of certain medicines. In many cases, premature ejaculation gets better on its own over time. Treatment may not be needed. Practicing relaxation techniques or using distraction methods may help you delay ejaculation. For some men, stopping or cutting down on the use of alcohol, tobacco, or illegal drugs may improve how well they can control ejaculation. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Ivan R. Rommstein