Dr. Alisha Vonbun Olsthoorn – Obstetrician and Gynecologist (OBGYN) | Mississauga, ON

Dr. Alisha Vonbun Olsthoorn, a respected Obstetrician and Gynecologist (OBGYN), focuses on empowering women through all stages of life with expert medical and surgical care, from adolescence through menopause and beyond. Practicing at a clinic and/or hospital setting in Mississauga, ON, she offers accessible and high-quality care to the community. Her practice adheres to the standards and ethical guidelines set by the College of Physicians and Surgeons of Ontario (CPSO). Providing comprehensive care across the full scope of Obstetrics and Gynecology, including routine and complex conditions, Dr. Olsthoorn is dedicated to supporting women's health with compassion and expertise. She serves women of all ages, including prenatal and postnatal patients, ensuring each woman receives personalized, respectful care in a comforting environment.

Dr. Olsthoorn graduated with her Medical Degree from the University of Toronto in 2016.0 (Canada). She has been practicing as a specialist in Obstetrician and Gynecologist (OBGYN) for over 3 years, since 2021. She is certified as a Royal College of Physicians and Surgeons of Canada (RCPSC) Specialist, demonstrating her commitment to maintaining high standards of medical excellence and ongoing professional development.

Her clinical philosophy centers on patient-centered care, shared decision-making, and evidence-based practice. Dr. Olsthoorn is dedicated to improving women's health outcomes in Mississauga through compassionate, respectful, and comprehensive care. She is fluent in English and strives to create a welcoming environment where women feel heard, informed, and supported throughout their healthcare journey.

Dr. Alisha Olsthoorn provides care for a wide spectrum of women's health issues, including:

Sexual Health and Dysfunction

• Vaginismus: Involuntary muscle spasms in the pelvic floor muscles that make vaginal penetration painful or impossible.
• Dyspareunia (Painful Intercourse): Persistent or recurrent genital pain that occurs just before, during or after sexual intercourse.
• Decreased Libido / Sexual Desire Disorders: Persistent lack of sexual interest or desire, which can have various physical or psychological causes.

Infertility and Reproductive Health

• Uterine Factors Affecting Fertility (e.g., Septum, Asherman's Syndrome): Structural abnormalities or conditions of the uterus that can interfere with implantation or pregnancy maintenance.
• Fallopian Tube Disorders (Blockage, Hydrosalpinx, Adhesions): Conditions affecting the fallopian tubes, such as blockages or scarring, that can prevent sperm from reaching the egg or a fertilized egg from reaching the uterus.
• Ovulatory Dysfunction (e.g., Anovulation, Oligo-ovulation): Problems with ovulation (the release of an egg from the ovary), such as infrequent or absent ovulation, a common cause of infertility.

Common Benign Gynecological Conditions

• Lichen Sclerosus / Lichen Planus (Vulvar): Chronic inflammatory skin conditions that can affect the vulvar area, causing itching, pain, and changes in skin appearance.
• Endometriosis: A painful disorder in which tissue similar to the uterine lining (endometrium) grows outside the uterus, commonly on ovaries, fallopian tubes, or pelvic lining.
• Vaginitis (Yeast Infections, Bacterial Vaginosis, Trichomoniasis): Inflammation of the vagina that can result in discharge, itching, and pain, commonly caused by infections or imbalances in vaginal flora.

This list highlights some common conditions managed within Obstetrics and Gynecology and is not exhaustive. For personalized advice regarding your specific health concerns, please schedule a consultation with Dr. Alisha Olsthoorn or your primary care physician for a comprehensive evaluation and appropriate referral if needed.

• Laparoscopic Surgery for Endometriosis & Ovarian Cysts (Excision/Ablation): Minimally invasive surgical techniques for diagnosing and treating endometriosis implants (excision or ablation) and removing benign ovarian cysts.
• Dilation and Curettage (D&C) / Dilation and Evacuation (D&E): Procedures to dilate the cervix and remove tissue from the inside of the uterus, for diagnosis or treatment of various uterine conditions or after miscarriage.
• Diagnosis & Treatment of Vaginal Infections & Sexually Transmitted Infections (STIs): Management of conditions such as yeast infections, bacterial vaginosis, trichomoniasis, and screening/treatment for STIs like chlamydia, gonorrhea, syphilis, and HIV counseling.
• Postpartum Care & Follow-up: Medical follow-up and support for mothers in the weeks following childbirth, addressing physical recovery, incision care (if applicable), breastfeeding support, contraception planning, and screening for postpartum mood disorders.
• Surgical Management of Pelvic Organ Prolapse (e.g., Colporrhaphy, Sacrocolpopexy): Reconstructive surgical procedures to correct the descent of pelvic organs like the bladder, uterus, or rectum, often utilizing native tissue repair or mesh augmentation.
• Tubal Ligation / Salpingectomy for Sterilization: Surgical methods for permanent female contraception, including removal of fallopian tubes (salpingectomy) which may also reduce ovarian cancer risk.
• Menopause & Perimenopause Symptom Management: Personalized guidance and treatment options for symptoms associated with menopause, including hot flashes, vaginal dryness, sleep issues, and discussion of hormone replacement therapy (HRT) and non-hormonal alternatives.

Note: This list may provide an overview of common services in Obstetrics and Gynecology. Dr. Olsthoorn provides a wide array of diagnostic, therapeutic, and surgical options tailored to individual patient needs within women's health, pregnancy, and childbirth. Specific services offered can be confirmed by contacting the clinic.

All medical and surgical services are provided in accordance with the standards of practice set by the College of Physicians and Surgeons of Ontario (CPSO). A referral may be required for insured services.

Dr. Olsthoorn's practice is located within a modern clinic in the vibrant neighborhood of Churchill Meadows in Mississauga. The facility is conveniently situated close to the Sheridan College Hazel McCallion Campus, making it accessible for students and residents in the area. Patients can easily reach the clinic via MiWay (Mississauga Transit), with nearby bus stops providing convenient transportation options. The facility is wheelchair accessible, ensuring comfort and ease of access for all patients. Parking is available at the facility, providing added convenience for those arriving by private vehicle. The clinic offers a welcoming environment dedicated to providing high-quality women's healthcare services in a comfortable setting.

Are services from Dr. Olsthoorn, an Obstetrician and Gynecologist, covered by Ontario Health Insurance Plan (OHIP) in ON?

Medically necessary consultations, prenatal care, delivery, gynecological surgeries, and diagnostic procedures performed by a licensed Obstetrician and Gynecologist like Dr. Olsthoorn are generally covered by Ontario Health Insurance Plan (OHIP) in ON when you have a valid referral from your family doctor or another referring physician. Some elective procedures, certain fertility treatments, or non-medically indicated services may not be covered. It's always recommended to confirm specific coverage details with Ontario Health Insurance Plan (OHIP) or the clinic.

Do I need a referral from my family doctor to see Dr. Olsthoorn, an Obstetrician and Gynecologist?

Yes, for services to be covered by your provincial health plan (Ontario Health Insurance Plan (OHIP)), a referral from your family physician or another specialist is typically required to see an Obstetrician and Gynecologist like Dr. Olsthoorn for most consultations and treatments. This ensures coordinated care. Some specific services or clinics (e.g., some sexual health or contraception clinics) might have different access pathways, but for ongoing obstetrical or gynecological care, a referral is standard. Please check with Dr. Olsthoorn's office or your referring doctor.

Does Dr. Olsthoorn discuss or offer the HPV vaccine?

The Human Papillomavirus (HPV) vaccine is highly effective in preventing infections with HPV types that cause most cervical cancers, as well as other anogenital and oropharyngeal cancers. Dr. Olsthoorn can discuss the benefits of the HPV vaccine, current recommendations for different age groups (including catch-up vaccination for adults), and can either provide the vaccine or refer you to where it can be obtained, depending on clinic services and provincial programs.

What birth control options can Dr. Olsthoorn discuss with me?

Dr. Olsthoorn can discuss a wide range of contraceptive options tailored to your individual needs and preferences. These include hormonal methods (like birth control pills, patches, vaginal rings, injections, hormonal IUDs, contraceptive implants), non-hormonal methods (like copper IUDs, condoms, diaphragms, cervical caps), and permanent sterilization methods (tubal ligation or Essure for women, vasectomy referral for men). The best option depends on your health, lifestyle, menstrual cycle characteristics, and family planning goals. Dr. Olsthoorn will help you make an informed choice.

502-2000 Credit Valley Rd
Mississauga, ON L5M 4N4

Phone: (905) 820-8748 | Fax: (866) 820-5299

The facility is wheelchair accessible.

Dr. Olsthoorn is a licensed Obstetrician and Gynecologist regulated by the College of Physicians and Surgeons of Ontario (CPSO) under the Regulated Health Professions Act, 1991 and Medicine Act, 1991 in ON. A referral from your family physician or another qualified healthcare provider is typically required for provincially insured consultations and treatments.

Verify registration with the College of Physicians and Surgeons of Ontario (CPSO): https://doctors.cpso.on.ca/DoctorDetails/Olsthoorn-Alisha-Vonbun/0310736-109310