The extension of the service marks Baby Loss Awareness Week which runs from the 9 to 15 October.
Ms Richler said: “We have been lobbying for this, it is important that there is a formal recognition.
“It’s only a piece of paper but it’s the most wonderful piece of paper, it means you aren’t invisible, the journey and loss you faced is recognised.”
More than 50,000 people have already received certificates since their introduction earlier this year.
The government said it was committed to ensuring bereaved parents were supported during what is a difficult time.
Health and Social Care Secretary Wes Streeting said: “I’m pleased we can now ensure all parents are able to apply for these certificates, no matter how long ago they lost their pregnancies.
“This government will always listen to women and families as we overhaul our health system to ensure everyone gets compassionate, safe and personalised care.”
