We are talking about purely for health checks
What's the point? The children who die or are seriously harmed are being seen weekly, in many cases daily, by an army of health care professionals. The Khan case is a wild outlier, but even in his case he was seen as a subject of concern and was the subject of two case conferences. In the Connolly, Pelska, Ishak, Williams and Climbie cases, the mothers/carers were manipulative and convincing, and were able to persuade senior social workers, consultant paediatricians and the police of their bona fides. People who are able to deceive and/or intimidate senior professionals are not going to be "found out" by health care visitors. The problem is not making the initial assessment of being at risk, as that happens already; the problem is doing something about it.
In the Khan case, there is quite rightly outrage about the boy's body being left to mummify in situ. It's a symptom of the failure of the system that he was invisible alive and unnoticed and unmissed dead. But what is more frightening is that an obviously out of control alcoholic, the subject of multiple concerns about domestic violence and with a large number of children and no visible income, was the subject of multiple case conferences at which point it was decided to take no further action. The mantra of "good enough parenting" and "professional optimism" went too far. In the case of Connelly and Pelska, concerns about DV affecting the mother similarly overrode protection concerns for the child, and the child's place at the centre of child protection was lost.
If you want to protect children, it does not involve naive health visitors turning up on the doors of functioning families in order to make us all feel better about ourselves. It involves social services being willing to make tough decisions to remove children from women who are already themselves victims.
Khan, Connolly, Pelska, Ishak, Williams (Rebecca Shuttleworth), Climbie (Marie-Thérèse Kouao): take out the fact that they killed a child they were responsible for and they are sympathetic cases: raped as child, refugee, victims of DV, abused by schizophrenic husband, etc. They were hopelessly, pathetically inadequate parents, and with the possible exception of Kouao, they did not set out to kill a child. Social workers saw them as victims themselves, and attempted to make them better parents. The social workers didn't expect them to kill their children, because most pathetically inadequate parents don't. The question is: should we be leaving children to be raised by pathetically inadequate parents, even if with a lot of help they become slightly less inadequate? What life was Peter Connolly or Hamzah Khan destined for had they not died?
There isn't a queue, or even a vague huddle outside the door, of competent people wanting to adopt trouble toddlers. Children's homes have proved disastrous. There's a critical shortage of foster carers. What do we want to do about children being raised badly by inadequate parents? What's the point in identifying the tiny handful that slip through the system, when we're so bad at helping the vast majority that don't?