Hello everyone, I'm interested in partner births, who has already gone…

Hello everyone, I'm interested in partner births, who has already gone through this? We have been talking about it for a long time with my husband. I would like to hear your stories ??. And by the way, how can we predict the day of birth, ultrasound third trimester now stands on November 14th, although at the second trimester it was November 9th. I will be located in Saratov and naturally plan to give birth there, while my husband is in Kz, so what number or time should he come, not to miss but also not to be early. His work connections will only release him for a week, that's the problem. And one more question, will they let