If someone through deception robs you of the ability to give informed consent then it would fit the legal definition to allow prosecution for rape or sexual assault. At least as far as my reading of the law has taken me.
I personally hate this whole debate, primarily as I am currently raising a child from just such a scenario. It so often gets derailed as some sort of stick to beat women with, and other than myself I know of one other bloke this has happened to. It sucks for me and him, but I have actually lost count of the number of female friends who have suffered rape or sexual assault of some kind. It seems wiser to keep focus on male rape of women.
That said on a very personal note I have dealt with a fair few trying scenarios in my life time up to and including my best friend dying in front of me, and being able to do fuck all about it, caring for a loved elderly relative with Alzheimer's and watching helplessly as they slowly lost themselves to it, so please understand my full meaning when I say the sense of being betrayed and used in this way by someone who purported to love me was the single worst experience of my life. Wether that equates to what a rape victim feels I'm afraid I don't know, but to be honest it's beside the point because rape shouldn't happen, and what happened to me shouldn't happen either.
Just before anyone chimes in with the inevitable condom comment. Absolutely I could have chosen to have worn one and as such was my responsibility not to and I'm taking responsibility for that now. The sticking point for me was I was happy to use them she wasn't, and I did not let it stand at that, I frequently checked verbally on the birth control status and reiterated I was happy to use condoms as I has been in two prior long term relationships where pills and such played absolute havoc with my partners health, so was perfectly happy to use them.
Luckily fatherhood for me has been something I have always desperately wanted, and as such I had considered the potential for happy accidents. However that does not one iota excuse the lies and deception. Is it possible to stand against both women being raped and men being lied to about birth control? If so I choose that.