Home hope Helen Briem and Sweden's Ellinor Sudow are joint leaders on eight under par after 36 holes of the Amundi German Masters.
Briem began exceptionally well with three birdies on her first three holes. However, she then registered three bogeys on holes five, six, and seven, bringing her back to level par for the day.
She rediscovered her rhythm on the back nine, making birdies on the 10th, 14th, and 18th holes.
It was an excellent 27th birthday for Sudow, as she recorded six birdies and three bogeys to join Briem on eight under.
Singapore's Shannon Tan moved into outright third place, just one shot behind the leaders, after firing a round of 69.
The Olympian played a bogey-free round, making birdies at the first, seventh, 11th, and 15th holes to reach a total of seven-under-par at the halfway mark.
England’s Alice Hewson and New Zealand’s Amelia Garvey are tied for fourth place on six under after both women registered second rounds of 72.
The Irish challenge faltered somewhat, with Anna Foster's round of 74 and Lauren Walsh's 73 leaving them in a five-way tie for 22nd place on two under.
The cut fell at three over, with Annabel Wilson and Canice Screene both missing out the weekend's action.
Reflecting on her second round, Sudow said: "It's a really good birthday. I had a wonderful day out there. It was tougher today, but I was able to roll in some birdies, so it was fun.
"It was nice to start well as I hit the first tee shot so far right, I had a bad lie and somehow managed to put it to six or seven feet and roll in that birdie very firmly and after that, it was pretty straightforward.
"I didn’t hit my drives very well today at all, I was very nervous overall and felt my legs shaking in the backswing throughout the 18 holes. It was a lot of nerves, a good test for me. It’s been a long time since I’ve felt that way."
