I had ICSI to conceive DS due to DH lack of live sperm (failed vasectomy reversal).
I had to complete the full IVF cycle each time including the drugs to "downregulate" and then injections to stimulate the ovaries. I then had egg collection under GA and DH had immature sperm aspirated under local anaesthetic.
With ICSI the sperm is injected into the eggs, and then any resulting embryos can be replaced or frozen.
When I had my eggs collected I had a problem with overstimulation of my ovaries (quite common because of the drugs involved) so I opted to freeze all my embryos.
I then went back to the clinic to have 2 defrosted embryos replaced, which resulted in a positive pregnancy test, but had an early m/c at 7 weeks {sad].
A few months later then had a further 2 embryos replaced and another positive pregnancy test which resulted in DS
IIRC you can choose to only have 1 embryo replaced if you wish, any clinic would respect this decision.
The "soft" IVF option sounds interesting, I wish it had been available then.
Hope you get on OK Katie - do you have an appointment to start treatment?