Hi and welcome
I have no experience of this particular pill, but from Google I learn :-
"Co-cyprindiol contains two ingredients, ethinylestradiol and cyproterone. Ethinylestradiol is an oestrogen, which is a female sex hormone. Cyproterone is an anti-androgen. Androgens are responsible for stimulating the glands on your skin which produce an oil (sebum) and they also encourage hair growth. Co-cyprindiol works by reducing the amount of androgen you produce, which helps to clear acne and reduces excess hair growth."
What I already knew :-
Cyproterone Acetate is sold under the brand name Androcur. It is a powerful anti-androgen ( which is known to often cause depressive mental effects.)
The suppression of testosterone alone will allow the normal estrogen content of the male body to very slowly feminise.
Ethynilestradiol is a modified estrogen molecule. The modification gives it a much longer half-life in the body and thus a much lower dose is needed than would be the case with estrogen. (e.g. typical doses - estrogen 2 milligram whereas ethynilestradiol 100 MICROgram )
From my own experience, I remember at about 6 weeks suddenly noticing that I had breast-buds, nipples protruding slightly and rather painful.
.......so I doubt that you are imagining things.
I would expect you to also notice, now or soon, that your ejaculate becomes watery and less volume as sperm production shuts down.
Please be aware that ethynilestradiol can be a dangerous drug to use and has thus fallen from favour.
The risk of DVT is higher than for plain estradiol, so it's use is not recommended for older transsexuals or those who smoke tobacco
(from Google) -
"Cyproterone acetate, sold alone under the brand name Androcur or with ethinylestradiol as
Diane or
Diane-35 among others,"
I advise you that Susan's Place (Trans forum) will not allow discussion at all of s similar (or same) pill
quote - "Diane-35 discussion not permitted
No sane or competent doctor would prescribe this acne medication/contraceptive as a medication for HRT in Male to Female Transsexuals. I have in the past banned discussion of the use of specific drugs, and I think it's time we do it again... A Google search only finds this drug mentioned in health warnings, self medication forums, and on online pharmacies."
,, just a few questions about hormones.. 
.. Being referred to gic, bearing in mind the waiting times for the first appointment I hope that you can understand my frustrations. So basically my gf who has gotten onto hrt a few months back had offered me her tablets that she didn't need any more which were co-cyprindiol (the pill).. So iv been taking them for just over two months now, mostly to help with hair and also vaniqa cream for the same reason.. Now I'm not sure that I'm going totally crazy but the last week I have noticed that my nipples are extremely sensitive and I was convinced that my chest is developing slightly.. I'd put this down to wishful thinking but the other morning I was convinced..
