Prince William, Kate Middleton
Prince William, Kate Middleton and their son Prince George during a visit to the Sensational Butterflies exhibition at the Natural History Museum in London.Reuters file

Pregnant Kate Middleton is reportedly having a tough time due to an extreme case of morning sickness, and reportedly, this has prompted the royal couple to ditch their original plan of having three children.

Even before Middleton and Prince William announced the news that the Duchess was pregnant with their second child, various publications had noted that the royal couple has repeatedly expressed a desire to have more children. Unconfirmed reports have also stated that the royal couple is expecting twins this time around.

However, because Middleton has been suffering from hyperemesis gravidarum, Prince William does not want his wife to suffer. 

Middleton was hospitalised with hyperemesis gravidarum during her first pregnancy with Prince George as well, and it is believed that she will once again go through the same ordeal if she got pregnant a third time.

"Originally, the couple had talked about having lots of kids–but hadn't anticipated Kate enduring such a tough time, She was terribly worried Wills would be heartbroken–but he was touchingly sympathetic!" a source told The National Enquirer, according to The Epoch Times.

Middleton is currently resting at her parents' home in Bucklebury, Berkshire, and she will soon take up her official duties, as the Duchess is said to be doing better. Reports have it that Middleton will take part in the state visit of the president of the Republic of Singapore on 21 October. However, her attendance will once again be reviewed closer to the date. 

Earlier rumours had suggested that Middleton was staying out of public view as she was embarrassed about her bloated features.

"Kate is feeling so lousy that she just wanted to be with her family and out of public view," a source told Daily Mail. "She is extremely close to Carole, who is very much a hands-on grandmother. Between her and their nanny, Maria, Kate has all the help she needs with George while she is feeling so sick," the source said.

"And Bucklebury is somewhere she can just relax and be herself."

Meanwhile, Prince William has been a supportive husband, and he is constantly communicating with doctors to find out solutions to make his wife better.

"It's been so difficult, but she has all the people she loves around her," a source told Boston Herald, according to The Epoch Times. "William's been amazing throughout all of this. He's in constant communication with the doctors. He doesn't like seeing Kate unwell and just wants her to get better so they can enjoy the rest of the pregnancy."