To answer all the wonderers with a bit of common sense from very mild reading around this thread… seriously, read one article people!!
Tana and Gordon have always needed ivf and their first three children are the product of it.
They first embarked on this second stage of their family around 2015, at this point she was 40/41. Her children would have been 17, 15, 15 and 14 at that stage….. A stage where they stop being kids and are morphing into adults. She loves having babies and young children so maybe felt unhappy with this. Perhaps he did too.
If, and I say if, they did ivf again it’s unlikely embryos/eggs from their younger days were used, they may have had a second round of harvesting around the 40 mark and these still would be viable. We wouldn’t all be raising eyebrows about a 40/41 year old woman having a baby and this is certainly roughly the age they began their process of family expansion.
After the tragic loss of their son Rocky in 2016, they now have two further children Oscar and his brother Jesse James.
Of course the intricacies of their decision making, what actually happened and the medical aspects can only, and should only, be known by themselves.
But from an outsiders point of view, reading one article regarding their family life (and being able to do simple maths) everything seems very straightforward. And they seem a very happy and loving family. How lovely there are more children to love now.