I've never heard of a training course in this topic. So long as you read and understand the guidance you should be able to carry it out. The form I use is based on a checklist of hazards (work at height, etc) and requirements (rest areas and the like), derived from the guidance and omitting the hazards that never occur in my workplace - then I find out which hazards apply in the woman's job and discuss with her and her manager what needs to be done.

Reg 3 requires all employers to take care to consider women of child-bearing age when conducting risk assessments.The duty is to the unborn child at the very earliest stages of development, when most women are unaware they are expecting.
The greater bulk of the Risk Assessment should therefore already be in place
The individual assessment on notification of pregnancy then should be limited to considering those issues specifically mentioned in the Med3 form provided by the GP, which may to take into account history of miscarraige etc.
All things being equal, first trimester and beyond can pass without any particular issues, although additional rest periods may be required.
Anything beyond that and it's over to the Company retained GP or Occ. Health Provider.
I personally think INDG373 is a potentially confusing publication, particularly with regard to the actual MHSWR Regulation 16 requirements. Paragraph 94 of the L21 is also IMHO presented entirely out of context and is somewhat misleading.
As for a 'pro-forma': 2 columns, one with issues identified, second with agreed measures, co-signed and max. 3 month review period.

One of many dynamic issues to be discussed, agreed and kept under review by the employer and employee in close cooperative discussion with work modified as required. All relevant to the individual and not something that can be done by rote or by template?

Reg 3 requires all employers to take care to consider women of child-bearing age when conducting risk assessments.The duty is to the unborn child at the very earliest stages of development, when most women are unaware they are expecting."

Reg 3 of what?

How can the duty be to something we don't know?

What sort of activity would you not allow a women of child bearing age to undertake given she could get pregnant, but would allow a man to do or equally a women who cant conceive. I'm not even thinking of inequality!!!!