William Ziegler, DO, FACOG

Dr. ZieglerDr. William Ziegler is a specialist in Reproductive Endocrinology and Infertility and is the Medical Director of the Reproductive Science Center of New Jersey.

Dr. Ziegler completed a three-year fellowship specializing in reproductive medicine and surgery at the University of Vermont in Burlington. While in Vermont, he had the opportunity to work with nationally known specialists in IVF and ICSI.

During fellowship, he was involved in establishing the first Egg Donor program in the state. Even after completing fellowship, he continued to work with the residents and fellows at the University and facilitated completion of multiple research projects.

patients' choiceSince returning to New Jersey, Dr. Ziegler started the first egg donor program based in Monmouth and Ocean counties, offering some of the highest success rates in New Jersey. He holds faculty positions at both teaching institutions in Monmouth County; Monmouth Medical Center and Jersey Shore University Medical Center (an affiliate of the Robert Wood Johnson Medical Center) and works with both teaching institutions to organize continuing medical education programs to all medical professionals.

He received his medical degree at the University of Osteopathic Medicine and Surgery in Des Moines, Iowa and completed an Internal Medicine internship at Union Hospital in Union, New Jersey. This was followed by a 4-year residency in Obstetrics and Gynecology at the Medical Center of Delaware in Newark, Delaware. As a resident, he received multiple teaching awards and published several papers in peer reviewed journals.

During his three year fellowship, Dr. Ziegler received several awards for his presentations at the national meetings of the American Society of Reproductive Medicine and the Society for Gynecologic Investigation. These presentations focused on stimulation protocols, age – related fertility treatment and uterine blood flow. He recently received teaching accolades from Jersey Shore University Medical Center and has recently authored numerous articles and abstracts in the field of Reproductive Medicine.

Dr. Ziegler is a member of the New Jersey Medical Society, the American Society of Reproductive Medicine, the Society for Reproductive Endocrinology and Infertility, the Society for Reproductive Surgeons, a fellow of the American College of Obstetricians and Gynecologists, and is a Diplomat of the American Board of Obstetrics and Gynecology. He is also a member of several hospital committees and holds positions on pharmaceutical advisor boards regarding fertility treatment.

Originally from New Jersey, Dr. Ziegler decided to return home and serve the community of Monmouth and Ocean County. Dr. Ziegler is dedicated to providing his patients with the highest quality medical treatment in a caring and compassionate environment.


Fertility Patient Testimonials


Professional infertility doctor, highly recommended

“Dr. William Ziegler gave me accurate diagnosis and treatment. Successful IVF from first attempt. Kind, caring, compassionate attention and no waiting time during appointment. Professional infertility doctor, highly recommended.”


Dr. Z and his staff were the best thing that could have happened to us

“Dr. Z and his staff were the best thing that could have happened to us. From the beginning Dr. Z was friendly and understanding when it came to our struggles and needs. He listened and made sure that we were comfortable with every step of the process and never pushed for anything we weren’t comfortable with. The process can be daunting, but him, his PA, nurse and staff all make it much easier. The hardest part was getting released from our office to our regular OB for the duration of the pregnancy. Such a wonderful group!”


It was all worth everything

“This is a little late as my son is now 8 months old, but better late than never right! Dr Ziegler was phenomenal from beginning to end. Along with the rest of his staff we got through quite a few bumps and couldn’t have done it without them. The experience was always made as comfortable as this experience can be, which was so important to me because my battery level was low. I never thought in years I would be sitting here writing this and watching my baby boy sleeping like the angel he is. It was all worth everything. I would recommend reproductive science center of nj to anyone over and over! I actually have, and just may come back and try for baby number 2!”


Dr. Ziegler and his staff were exceptional

“Dr. Ziegler and his staff were exceptional during the entire course of treatment. My husband and I were both very pleased with the practice’s prompt and clear communication, beautiful and clean offices, and their management and organization of our appointments and procedures. We were able to conceive our daughter through IUI, which was a true blessing after a long road of fertility issues. We highly recommend Dr. Ziegler and Reproductive Science Center of NJ.”


Dr. Ziegler and his staff are top notch

“Dr. Ziegler and his staff are top notch. My husband and I started our infertility treatments at another practice, but we always left frustrated, cold and crying. We decided to switch to Dr. Ziegler. Although the road continued to get rockier, Dr. Ziegler and his staff always managed to provide the support and treatment to help make it smooth enough to make it through. With their treatment, patience, warmth and support we are so very happy to be expecting the child we thought we would never have in February. Even if our last treatment wasn’t successful, we would still think the world of Dr. Ziegler and his staff. Thank you all for your continued support and kindness.”


We will definitely be back for baby #2

“Dr. Ziegler was the most compassionate Doctor we have ever met. He made us feel comfortable from our very first appointment and we immediately felt that we were in great hands with his whole staff. We are very excited that he was able to help us conceive and we will definitely be back for baby #2.”


They went above and beyond

“After a late term miscarriage, we needed answers as to why. Dr Ziegler and the rest of the staff went above and beyond to help us. They are so professional and have always treated us well.”


We are truly blessed!

“Words can not express the gratitude we have for Dr Ziegler and his amazing staff. It’s been 7 years since the birth of our twins. We are truly blessed! I recommend a few of my friends to his practice, and they were all successful as well.”


Dr. Ziegler was so patient and reassuring

“It’s difficult to put into words how grateful I am for Dr. Ziegler and his staff. At a time of complete uncertainty, through failure after failure, Dr. Ziegler was so patient and reassuring. He explained everything thoroughly and seemed to truly care about his patients. He would always call me back the same day if I had questions, even if it was after hours by the time he called. If it weren’t for him and the RSCNJ, my husband and I wouldn’t have our beautiful baby girl.”


They made our entire IVF experience a delight

“Hands down the greatest medical practice I have ever dealt with. Dr. Ziegler and his entire staff in both Toms River & Eatontown locations were all so wonderful, knowledgeable and caring. I always received a call back if I had to leave a message and even had direct email contact to his PA. They walked us through every step of the process and made our entire IVF experience a delight. I actually cried when he released me to my regular OBGYN for the duration of my pregnancy. I will miss them all.”


He always makes time for you

“Dr. Ziegler and entire staff are extremely knowledgeable and professional. He is very patient and truly listens to all of your questions and provides easy to understand responses. He always make time for you and never feel rushed!”


None of this would be possible

“We went to Dr. Ziegler at the beginning of 2004 for IVF. This was our first time and we were scared. Thankfully, Dr. Ziegler, Scott and the entire staff put our minds at ease. They were beyond kind, professional and incredibly compassionate to us during all aspects of the process. I have described Dr. Ziegler as our gentle soul. How else do you recommend and explain to another couple what an incredible doctor he is? We were blessed to have our 1st cycle take and I delivered twins (boy/girl) on 11/17/05. My oh my they are so beautiful and healthy at 8+1/2 years old. NONE of this would be possible if not for Dr. Ziegler, Scott and their amazing staff. Thank you from our entire family. It’s so nice to see their group baby picture still on your website.”


Dr. Ziegler and staff welcomed us with open arms

“I can’t thank the whole staff enough for being so pleasant and courteous to my husband and I. The whole infertility experience can be very overwhelming and Dr. Ziegler and staff welcomed us with open arms. Our journey has just begun and I couldn’t be happier to have this office helping us.”


We could never say thanks enough!

“Dr. Ziegler and his team gave us the greatest gift of all! Our son is a year old now and we got pregnant with him on our first IVF cycle! We could never say thanks enough!”
Pat & Janet


It’s all thanks to Dr. Ziegler!

“There are not enough wonderful words to express my love and appreciation for Dr. Ziegler and all of the staff at the Reproductive Science Center of New Jersey. My husband and I first met Dr. Ziegler in June 2013. He made us feel comfortable and at home from the moment we met him. Although the IVF journey isn’t an easy one, everyone at RSCNJ made us feel at ease. At every step of the way, Dr. Ziegler explained everything to us in a way we were able to understand. He told us all of our options and guided us in the right direction. He was always available to answer questions and clarify things for us. Fran and the other nurses were always available as well. Even when I called after office hours, someone always got back to me immediately. The office staff was always super friendly and helpful as well! We are thrilled to say that a year and 2 IVF cycles later, we are 4 months pregnant and it’s all thanks to Dr. Ziegler! We are so, so thankful to him and his whole team for making our dreams come true! Thank you!!!”


We were very pleased

“Dr. Ziegler explained everything in detail to us and answered all of our questions. We were very pleased with his attention to our needs.”


Dr. Ziegler anticipates patient questions

“The staff is sensitive to the nature of the patient visit and are great at making the patient feel welcomed and comfortable. They return calls promptly and answer all of your questions. Dr. Ziegler anticipates patient questions and answers them before they are asked. He even helps to allocate anxiety by giving reliable websites to read more info!”


This precious gift

“Dr. Ziegler and his team made our lives complete with Julia. I will never know how to thank someone for this precious gift we have.”


An amazing person

“Dr. Ziegler is not only an amazing doctor, but an amazing person. All staff are sympathetic to the ups and downs of the fertility rollercoaster. I would have been lost without their support.”


My first Mother’s Day

“Thank you Dr. Ziegler for helping us conceive our little Mila and my first Mother’s Day!! Wonderful staff!”