Although this would be a total relationship ender, by law once the semen is our of his body it's considered trash and you can TECHNICALLY do whatever with it. That being said, I live in Canada. I've heard of cases where the father finds out and wins full custody of the child, he might leave you AND ask for the child. Not worth it.
I really want a child of my own, I live with my partner and his 4 year old daughter that we have won custody over from his kidnapping ex-wife (all this before any of us turned 25).
Kids are allot of work, yet seeing her every morning makes me want my own even more. He wants to wait until this house sells, most likely in a year the way the market is going. I'm in university, and even though it would hurt my schooling badly I still feel that it is time.
Having a miscarriage in a previous relationship hasn't helped with this yearning.
He has made promises to me about certain times (when we get the girl back, after Christmas, in feb..goes on and gets extended.) There will always be a reason that you are NOT ready for a child. No body really ever is, we just make do. I would suggest waiting longer. Being a mother is the most important thing to be, I'm very old fashioned it's what makes me me. Its our way in society.
What I did, I sat down with him and I said listen you've went back on your promises, I'm not getting younger and (name of kid) is getting older. We made a date and we are going to do this in june when she turns 5.. that means she will be almost 6 when the baby is born (sad for her, not a great playmate, unfortunately).
However before this date came into mind, I told him that I loved him dearly but that I have plans in my life and I would not put them aside forever for him. I had already decided I wanted to be a mother no later then 25 and that in 2 years if we did not have a child I would not be angry with him and I would not leave him. But that I would accept sperm donation from one of my male friend who also wants a child but does not want a relationship with anyone. This is the difference, my friend and I would have made the decision together..rather then lying to my partner and trapping him with a baby (yes it is entrapment whether or not you mean it to be).
Hope this helps