Partner changed their mind on cohabitation agreement

Read OP's first post - he moved in with her.

Yep I’d read that if you can find it and take all the positive advice and agreement that was on it. You won’t get that on this thread as you’re a man.

I'd ask her to move out. You're perfectly right to not have unprotected sex if you don't want a child together and she's broken her end of the agreement. Obviously you shouldn't have moved her in without it being signed to begin with as it's clearly important to you but now you're going to have to call her bluff or she'll never sign it and you can never move forward together in the way you want.

Surely if you have the greater assets then what does the cohabitation agreement say exactly? At this point you are just 2 completely separate individuals living together and so neither has a claim on each other’s assets.

if you were to buy buy a property you would need a document spelling out what each of you put into the property. If you get married then you might want a prenup just in case.

just struggling to understand the point of the agreement when you don’t have any joint assets

Pre-baby, she was being unreasonable.

But if you are planning to share a child with her you are being unreasonable.

You’re going to all the trauma of IVF, but are not prepared to commit to her unless she agrees to an arrangement worse than she’d get if you were married.

TBF, I’d be advising her to rethink that baby as a first priority.

You are at a life stage where child bearing is still a consideration. I wouldn’t agree to a cohabitation or prenup that did not heavily take that into consideration. Have you included generous provisions for her if she gets pregnant with your child? If not, then you are an absolute asshole and she should get away from you as fast as she can. Real men understand the economic and health risks women take when having a baby and don’t have a problem sharing assets because they are trivial in comparison.

A cohabitation agreement is not a pre nup.

I don't think you are necessarily unreasonable to want a cohabitation agreement - but, if she hasn't signed it yet, surely she hasn't 'changed her mind'? She is still thinking it through, with the help of a lawyer. That is what she is supposed to do. She may not have understood some of the ramifications until she spoke to the lawyer, may she?

I think you are both going at it too fast. Is egg retrieval urgent?

Surely, you both know that freezing unfertilised eggs is much less reliable and effective than freezing embryos. It is, frankly, a totally weird thing to do if you and she expect to be TTC as a couple within a short time frame.

Are you in the UK? This would be very unusual and pre nups may be considered by a divorce court but are very much not binding. They also need both parties to have had independent legal advice before signing if they are even to be considered. Sounds like she has only just had a solicitor look at it?

What does the agreement say?

This whole thing sounds very transactional and not trusting. Lacking in care and love

That's normal. If you are doing IVF it is important not to have unprotected sex, because you risk multiple pregnancy.

If you were my son I'd recommend he moved out and lived separately. She sounds manipulative, tbh.

She’s changed the goal posts. If this is a dealbreaker for you op, and it sounds like it is, you need to move out. If you both want to continue things on a living-apart basis that sounds like the way to go, or you split up.

What does the agreement state?

D'oh.
It's very simple then OP.
Move out.

You need to un-cohabit. She appears to be untrustworthy, agreeing, not signing, now saying the deal is off?

Have you purchased a house in both names? If so, Tenants in common on unequal basis or joint tenants?

Is the property you are living in, joint names? As in both names on the deeds/mortgage? If the property is in your name and it's only you paying the mortgage, then unless she could prove she was contributing to the mortgage, then again, she would have no claim on your home. If the property is jointly owned, then surely you would have ring-fenced any deposit you contributed at the time of purchase? If jointly owned, she would be entitled to a percentage of the profit, if the property were to be sold. If you marry, a Co-habitation Agreement, becomes void anyhow. Once you marry any assets you bring to the marriage are classed as 'joint assets' if you were to divorce. At the moment you aren't married, she's not legally entitled to any of your assets. You should have insisted the Co-habitation Agreement was signed and witnessed prior to moving in with each other. It seems to me, that your partner has been dragging her heels. I suspect she never wanted the agreement in the first place, and only agreed to it, to keep you happy. If she refuses to sign such an agreement, and you are bringing much more to the table in assets, than she is, I suggest you seek legal advice, if you're worried. There is nothing wrong in wanting to protect yourself financially. It may feel rather unromantic, but in all honesty if money is not her motivation, then signing an agreement shouldn't matter to her. It means you're both protected if the relationship should end.

If I had a cohabitation agreement, I wouldn't be letting them move in until it was signed tbh.
Obviously I don't know what the terms are but she's agreed to it and now changed her mind.

Maybe she's having some medical treatment that could damage her eggs or something and she wants kids further down the line

If you're in the UK and want to protect assets, you're best off staying unmarried as prenups are not always binding.

This. Just don't accept any money from her towards your assets and keep her as just a girlfriend.
Marriage is best for the lower earner, or two equals. You want to keep all your assets, so best stay legally single.

This makes no sense to me. You’re both intending to fertilise the eggs with your sperm, no?

It isn't a prenup.

"I wouldn't have moved in with her if she told me that from the start."
Op moved in with his girlfriend.

Where are you based? I thought prenups weren't binding in the UK especially if one party isn't happy about signing (as she doesn't appear to be). She clearly wants kids and you don't seem to be 'there' in terms of commitment so probably best to part ways and let her have a chance at finding someone fully on board.