Next year is set to be a bumper year for baby births, with the Diamond Jubilee, Kate Middleton's pregnancy - and the fall-out from E L James' bestselling erotic novel 50 Shades of Grey.

The popularity of the latter has led baby clothing companies to take advantage and produce 50 Shades-themed clothing for the newborns conceived as a result of the love affair between 50 Shades protagonists Christian Grey and Anastasia Steele.

Although many expectant mothers say the erotic novel has nothing to do with their pregnancy, others agree it led to them conceiving.

On a netmums forum, one user wrote: "I'm having a 50 shades baby!! Damn you Christian Grey!!"

Another said: "Im possibly pregnant after reading the books as me and hubby sex life has increased dramacticly (sp) And alot more adventourus (sp) thanks to books and yes the books r brill."

California-based Stephanie Beech, owner of Etsy online store Miss Phie's BOW-tique, has bought out a range of babygros for couples who are having a 50 Shades baby.

The outfits read: "9 Months Ago My Mommy Read 50 Shades of Grey", "My mommy aims to please" and "Mommy - lip biter, Daddy - eye roller", among others.

Another baby bib, from Esty seller Jody Wilson, owner of My4boys911, says: "I'm 'Lil Blip' Thank you 50 Shades of Grey".

For people who do not know what Lil Blip is, it refers to what Anastasia Steele calls her baby before going in to have a caesarean section.

Baby clothing companies have taken advantage of the 50 shades phenomenon by making themed babygros.

While many women have denied conceiving because of E L James' erotic novel, some freely admit the book was the cause of their pregnancy.

One woman on parenting forum netmums said: "I'm having a 50 shades baby!! Damn you Christian Grey!!”

A baby boom has been predicted for 2013 because of the Diamond Jubilee, Kate Middleton's pregnancy and the popularity of 50 Shades of Grey.

There has been some backlash to these items. Nancy Josephson Liff, writing for parenting website What to Expect, said: "Remember, what's funny to you now may send a completely different (and not necessarily appropriate) message to others. Bad taste is part of the equation."

Laters baby is Christian Grey's way of saying goodbye to Anastasia Steele. The fictional millionaire recently had a Twitter account set up in his name from which he tweets saucy messages.

A number of actors have been linked to the 50 Shades films, including Emma Watson, Ryan Gossling, Emilia Clarke and Alexander Skarsgård.

Anastasia Steele calls her child 'Lil Blip' while preparing to go for a cesarean section.