Hello,
Excess of anything is not good, no
masturbation does not affect fertility or obesity. Though addiction to masturbation is not good. If she is planning for a baby, she should maintain healthy weight. If
obese do exercises and walking regularly for conception to occur faster. Factors that affect the fertility of a woman are genetics, hormones, menstrual history, lifestyle, obesity, age, addictions (alcohol,
smoking, caffeine, age, past illness,
PCOS, etc.
For conception good quality sperms are needed, do a seminal analysis test.
Infertility treatment is done for both the partners for the best results. Masturbation does not cause any harm unless it goes rough & causes tears, abrasions (with sex toys). It may get infected & cause health issues.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Nupur K., General & Family Physician