Hi All,

This is the first time I have posted after stalking for a few weeks seeking information and answers..

I did my first IVF cycle in November 17 eggs collected and now 10 day 3 embryos frozen. Due to a risk of OHSS unfortunately I wasn't able to have a fresh transfer. Have had to wait until post Xmas and now in my first natural FET cycle just when I thought all was going well, my Oestrogen failed to rise so I was started on Puregon.

I am now day 15 and am unclear as to what happens next. I am hoping to ovulate naturally, but so far there has been no FSH surge. If this doesn't change in the next day or so I am assuming my FS will trigger ovulation - does this mean I am in a HRT FET cycle? If yes - can anyone advise - is HRT less favorable for success than natural FET?

Also - I would love some information regarding day3 embies vs day 5 blasts. Would I be better to thaw a couple of day 3 embies and try to culture to day5 blasts prior to putting one back?

Is it true that day 5 blasts have a better chance of success?

Thanks so much in advance....

Xx