Practically and realistically, it is much more convenient for virgins to start having regular intercourse in order to conceive. This would not only be more pleasurable experience but also considerably cheaper.
There are however instances where virgins will have to undergo IVF procedures if they suffer from extreme vaginismus.
Vaginismus is defined as the involuntary contraction of vaginal muscles at the vaginal opening in women with normal genital organs. The tight muscle contraction makes sexual intercourse or any sexual activity that involves penetration painful or impossible.
I have performed IVF for several of my patients who suffer from this form of extreme vaginimus in which they have been unable to engage in natural sexual intercourse with their husbands or even touch themselves.