Martyn Rooney ended an "incredible week" in style, celebrating the birth of his first child by anchoring Great Britain to 4x400 metres relay bronze as the World Championships came to a close.

The past nine days in Beijing have looked very promising a year out from the Olympic Games in Rio de Janeiro, with a seven-medal haul complemented by national records and personal bests aplenty.

Great Britain finished fourth in the medal table after winning four golds, but it was not until the final day of competition that they met UK Sport's minimum target of six medals.

They need not have been concerned, though, as the women comfortably secured 4x400m bronze before the men followed suit just 20 minutes later, with Rooney bringing the team of Rabah Yousif, Delano Williams and Jarryd Dunn home.

The British captain's wonderful surge and dip saw Jamaica pipped by just four-thousandths of a second, with the podium finish capping a remarkable time for the 28-year-old on and off the track.

"It has been an incredible week for me," Rooney said after the season's best two minutes 58.51 seconds on Sunday.

"These have been eight days where I've had a PB, not a great semi-final and the birth of my child.

"The relay heats went well and then in the relay final we ran well as a team and got a medal. It's incredible."

It was a certainly a leader's display from Rooney and one which led wife Kate, a former international pole vaulter, to joke their baby boy would now be called 'Bronze Beijing Rooney'.

"I'm desperate to get home now, desperate," he said, before playing a part in the closing ceremony.

"I don't know it as my son yet, it's still 'it'.

"I've seen pictures of 'it' but I can't wait to meet him and hold him. I'll name him when I get back.

"I can't stop talking to Kate on the phone. I keep checking on her and checking on the baby, but she's doing really, really well.

"She went to Tesco the next day so she surprises me every day. She's an amazing woman and I'm very lucky to have her as my wife and the mother of this child."

Like Rooney, Great Britain's women will also leave Beijing with special memories after their third place in the 4x400m.

Christine Ohuruogu, Anyika Onuora, Eilidh Child and Seren Bundy-Davies all put in solid displays as they crossed in a season's best 3:23.62 - a welcome boost at the end of a frustrating championships for the relay team's oldest member.

A poorly-run final not only saw Ohuruogu lose the individual 400m world crown but cross last, making the final-night success taste all the sweeter.

"I probably didn't make the best judgement call (in the individual 400m), which is unusual because I'm usually very good at judging races," she said.

"It's the first time in 10 years I've made such a fatal error and it cost me big time.

"This time around I was a bit worried because it wasn't just me on the line, it was everyone else's performance. If you mess up, you put pressure on the rest of the girls.

"I knew we could win a medal, I just thought 'run (your) own race and get the girls in contention'."

Only two other British athletes were involved on the final evening of competition in Beijing.

Charlie Grice's time of 3:36.21 saw him finish ninth in the men's 1500m final, while Steph Twell ended 12th in the 5,000m.