Women's Aid says Ireland needs to bring in a system of domestic homicide reviews for such cases.
It is also urging victims of domestic violence to seek help following the Nadine Lott murder trial.
On Thursday Daniel Murtagh - of Melrose Grove, Bawnogue, Clondalkin in Dublin 22 - was found guilty of her murder.
She died in hospital on December 17th 2019 - three days after her ex-boyfriend, Murtagh, subjected her to a beating that left her unrecognisable to her family.
A paramedic described the scene in her apartment as one of the most horrendous ones he had ever walked into.
Sarah Benson, CEO of Woman's Aid, told The Pat Kenny Show Ireland should be doing more.
"In Ireland we don't yet have what they have in the UK and US for example, which is domestic homicide reviews.
"Those are really important, and we have a study that is nearing its conclusion which was commissioned by the Department of Justice.
"What these do is when these appalling incidents occur is to do a full and thorough review.
"Not to look at where there was failings or to cast blame, but to look at where could potentially our systems have worked better?
"Where could we have seen signs, where could - if there were organisations involved - where are there things that we might have been able to do to prevent these things happening again in the future".
Ms Benson says the most dangerous time can sometimes be after a relationship ends.
"One of the things that Woman's Aid - as a domestic violence organisation does - is we maintain the femicide watch in this country.
"The vast majority [of women who die violently] will die at the hands of a current or former partner.
"And it's something that people don't realise is that where you have an abusive relationship, where you have a coercive, controlling relationship where one person seeks to exert power and control over the other, where their wants and their needs are taken as more important than those of their partner - those are very dangerous relationships.
"In many cases the most dangerous time is either where the abusive partner believes that the relationship is about to end, or when it has just ended.
"That's the point where they feel their power, their control is being removed."
Ms Benson says often those being abused "are not passive in their situation - in many cases they are ingenious survivors.
"The reality is that they are not responsible for the abuse, and the person who can chose to cease the abuse is the perpetrator".
And she says those responsible should be held to account "and to say 'this behaviour is not OK'.
"Behaving jealously is not romantic, it is actually a very significant red flag to say that you see this person possibly as your possession and not as your equal.
"So there are signs, even early on in these relationships, but those who are suffering... really need our compassion, understanding and our support".
'Don't suffer in silence'
Ms Benson says the idea of a 'jealous rage' excuses nothing.
"I don't know that this is the first case in which it has happened because I think increasingly, not just in Ireland, in other jurisdictions this idea of a crime of passion - which has led to mitigation in certain circumstances and sentences - the idea that somebody lost control in a jealous rage.
"As I say, jealously is actually no more than a sign that somebody is not perceiving their partner as being equal.
"And the idea of 'losing control' can again be a useful attempt at defence - but when you start to look at the pattern of behaviours that led up to a situation where somebody acts in a fatally violent manner, invariably in most cases you will find there were signs there".
And she is appealing to anyone who may need help to get it.
"First and foremost I would say don't suffer in silence, don't feel that you need to work though this on your own.
"Some people think that picking up the phone to talk to somebody that's only for them if they're in a situation of real crisis, whereas that's not the case at all.
"We would have woman calling us to say, in absolute confidence, something doesn't feel right in this relationship and they're given that space to tease out what it is that's going on.
"And then of course, where there is real danger, we can act as a referral point to refuges, advise on protective orders.
"What I would say is if somebody feels in immediate risk never never to hesitate: if somebody can make one phone call, make it 999 or 112".
Anyone affected by issues raised in this article can contact Women's Aid on 1800-341-900. In an emergency, dial 999 or 112