Nicci Menashe, who came up with the idea on Wednesday, described how Ms Berger, who also has a daughter turning two this month, “has been the subject of such abuse during both pregnancies. She hasn’t had time to focus on her babies because she’s fighting our fight.
"Every single Jewish person has a duty to thank her, they really do.
“She’s taken such hell. No-one understands. If you’re pregnant you should be thinking about your baby, and she’s been thinking about us.”
Mrs Menashe added: “We didn’t have time to make this an official thing. Mothers spoke to mothers, children started writing. We literally had 24 hours.
“Not just e-mailed letters, physical handwritten letters as well. It was the most incredible 24 hours I’ve had to witness, just pure love. The most magnificent cards you ever seen, with nothing other than ‘you’ve been through so much for us, can we just give a little bit back to you’.
“Some people offered gifts – they own a baby shop, can they give her a pram. A reflexologist offered her a free session…

“The best thing about this is that these are from both Conservative and Labour people. This wasn’t about politics, politics was thrown out the window. It was about pure love from one Jewish person to the other.
“All different religious levels. We’ve had letters from Rabbis, from schoolchildren, from university students, from Holocaust survivors – all different religious levels, every different type of Jew.”
On Thursday night, Mrs Menashe presented the Liverpool Wavertree MP with a baby gift and the scores of letters which had been received at that point, although she said that “more had come in since then.”
She described how the MP said that it "had meant so much" to receive the letters.
“She said when she has the baby she’s going to be reading them slowly and opening the gift we gave her.”