Introduction Understanding and improving IUI pregnancy rates has enormous global appeal and application. This pilot study goes one step further by utilising consecutive ejaculates from men with oligozoospermia and comparing with normozoospermic male group. Materials and Methods A retrospective analysis was performed on 117 IUI-stimulated treatment cycles in a small fertility clinic in North Middlesex University Hospitals Trust, UK, within a NHS setting. Risks of OHSS and multiple births are carefully controlled. Results In our cohort, several factors are associated with positive IUI pregnancies and these were: age of the woman, inseminating with C5 total progressive motile sperm; having C50 % Grade A sperm progression and having C1 Dr. Gulam Bahadur is a past member of the HFEA. His main involvement is in andrology with special emphasis on diagnostic analyses, male cancer patients, counselling, sperm donor recruitment and sperm freezing, and recovery rates following cryopreservation. Important ways to optimise pregnancy rates in simple first-line treatment intrauterine insemination are being researched and applied within a number of UK NHS Trust Hospitals. Dr Bahadur has made significant contributions to the understanding of semen qualities in subfertile males, cancer patients, adolescent cancer patients and produced one of the first reports on ovarian tissue freezing for cancer patients.The Journal of Obstetrics and Gynecology of India (September-October 2016) 66(S1):S513-S520 DOI 10.1007/s13224-016-0876-0 123follicle achieved with a realistic hMG dosage, hCG trigger and IUI of 29.7 h (2.5-38.4 h), with an endometrial thickness of 10.7 mm (6.6-13.4 mm). Bifollicular presence in at least half the cases along with hMG protocols added usefully to the pregnancy outcomes. Conclusions The pregnancy rates per cycle were 19 and 23 % in the consecutive ejaculates and non-consecutive ejaculate groups, respectively, P = 0.59. For the whole cohort, the pregnancy rate was 20.51 % per cycle and 33.8 % per women. This approach if validated with large RCT will have universally beneficial effects.