He was joined by military officials who contributed to the success of the ICBM test, the news agency said.
Dr Reissland, who has an expertise in studying foetal development, thanked the mothers who took part in her study, especially those who smoked.
"I'm really grateful, they did a good thing," she said.
In a video clip spotted on Twitter, Kim can be seen puffing on a cigarette as the missile is set up to be launched on Tuesday.
No one stopped the North Korean leader from smoking there, even though liquid fuel is highly dangerous and even if it controlled can be volatile.
After studying their scans at 24, 28, 32 and 36 weeks, she detected that foetuses whose mothers smoked continued to show significantly higher rates of mouth movement and self-touching than those carried by non-smokers.
Foetuses usually move their mouths and touch themselves less as they gain more control the closer they get to birth.
Dr Reissland, from Durham's Psychology Department, said: "A larger study is needed to confirm these results and to investigate specific effects, including the interaction of maternal stress and smoking." She believed that videos of the difference in pre-birth development could help mothers give up smoking.
But she was against demonising mothers and called for more support for them to give up.
" I think my street cred will improve.'She was joined on the trip by Loose Women's Linda Robson, 59, Christopher Biggins, 68, retired footballer John Fashanu, 55, and darts supremo Bobby George, 71.
Pam said the group were like 'kids at Disneyland' as they smoked joints and ate marijuana-laced meals.
Smoking not only impacts pregnancy but stops women conceiving.