Dr Wiswedel is one of the pioneers of fertility treatment in South Africa and author of numerous publications pertaining to infertility. After 10 years as head of the IVF and Infertility Unit at Groote Schuur Hospital, University of Cape Town, he started the private Cape Fertility Clinic in 1993 after leaving the hospital.

Under his guidance many successes have been achieved for South Africa, including the first pregnancy from donated eggs, first pregnancy from micro-injection, first to use GnRH agonist and ultrasound guided ovum pick ups.