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Home » Relationships » Understanding Pregnancy Hormones and Their Effect on Your Relationship

Understanding Pregnancy Hormones and Their Effect on Your Relationship

  Written by Tarryn Adonis
  Published on September 25th, 2025

Pregnancy is a time of incredible physical and emotional transformation, and one of the driving forces behind this change is hormones. While these hormones are essential for maintaining a healthy pregnancy, they can also lead to emotional shifts that affect both the pregnant person and their partner. Understanding how pregnancy hormones influence moods, behavior, and physical changes can help couples navigate this period with empathy, support, and understanding.


1. The Role of Pregnancy Hormones

Pregnancy hormones are responsible for many of the physical and emotional changes that occur during pregnancy. The most significant hormones include:

  • Human Chorionic Gonadotropin (hCG): This hormone helps maintain pregnancy in the early stages by supporting the production of other hormones like progesterone and estrogen. Elevated levels of hCG can lead to nausea and fatigue, especially in the first trimester.

  • Estrogen: Estrogen levels rise dramatically during pregnancy. It supports the growth of the uterus, enhances blood flow, and plays a role in the development of the baby. Estrogen can also cause mood swings and heightened sensitivity.

  • Progesterone: This hormone relaxes muscles and ligaments, preventing premature contractions. While it’s essential for maintaining the pregnancy, high levels of progesterone can cause fatigue, mood swings, and digestive discomfort, such as bloating and constipation.

  • Oxytocin: Known as the “love hormone,” oxytocin promotes bonding and affection. It also plays a key role in labor and delivery. While oxytocin helps strengthen the connection between partners, it can also increase sensitivity and emotional responses.

  • Prolactin: This hormone increases as the body prepares for breastfeeding. It can also have a calming effect, but may also contribute to feelings of irritability and emotional highs and lows.

These hormonal shifts can cause both physical and emotional changes that impact your relationship, and understanding these changes is key to navigating them together.


2. Emotional Rollercoaster: Hormonal Mood Swings

One of the most well-known effects of pregnancy hormones is mood swings. These emotional fluctuations can occur for several reasons:

  • Hormonal fluctuations: Rapid shifts in estrogen and progesterone can cause irritability, sadness, or emotional outbursts. Pregnancy hormones can make the pregnant person more sensitive to stress, leading to heightened emotional responses.

  • Increased sensitivity: Pregnancy often makes individuals more emotionally sensitive. A minor comment or an offhand remark from a partner can trigger strong emotional reactions. This heightened sensitivity can lead to misunderstandings or conflicts.

  • Anxiety and excitement: Pregnancy brings both excitement and anxiety. Hormonal changes can amplify these feelings, making it hard to navigate mixed emotions. Fear of the unknown or worries about the future may surface more strongly.

How to Handle It:

  • Patience and empathy: Understand that emotional outbursts or mood swings are often not intentional. Be patient with your partner’s emotional state and try to provide reassurance and support.

  • Open communication: Discuss feelings openly and honestly. Avoid letting emotional tensions build up, and instead, create a safe space to talk about worries and fears.


3. Physical Changes and Their Impact on Intimacy

Hormonal changes also affect physical health, leading to changes in intimacy and sexual desire.

  • Increased blood flow: High levels of estrogen cause increased blood flow to the pelvic area, which can heighten sexual desire for some people. However, this might not be the case for everyone. Pregnancy can make intimacy feel different, and some may experience heightened pleasure, while others feel less interested in sex.

  • Fatigue and discomfort: Increased progesterone can cause fatigue, while other symptoms like back pain, bloating, and nausea can make physical intimacy uncomfortable or less desirable. These physical changes can make one partner feel self-conscious or disconnected.

  • Body image changes: As the body grows and changes, pregnancy can bring up feelings of vulnerability and insecurity. It’s essential to acknowledge and support each other’s body image concerns and provide positive reinforcement.

How to Handle It:

  • Adjust expectations: Understand that intimacy during pregnancy may look different. Discuss your desires, boundaries, and preferences openly. It’s important to be flexible and make space for intimacy in other forms, like cuddling or talking.

  • Physical affection: Even if sexual intimacy isn’t on the table, physical affection—like holding hands, hugging, and kissing—can help maintain a close bond.

  • Respect each other’s needs: If one partner feels too tired or uncomfortable, respect that decision. At the same time, share your feelings and desires so that both partners feel heard and appreciated.


4. Hormonal Influence on the Partner’s Role

While most of the hormonal effects are experienced by the pregnant person, the partner is not immune to the changes. Hormones can affect both partners, sometimes in unexpected ways.

  • Increased empathy: In some cases, partners might experience heightened empathy due to the emotional shifts happening in the pregnant person’s body. They may feel more protective, caring, or even a bit overwhelmed by their partner’s needs.

  • Sympathy symptoms: Known as “couvade syndrome,” some partners experience pregnancy-like symptoms such as nausea, weight gain, or emotional changes. While this is not directly caused by hormones, it can create a sense of shared experience.

  • Stress and pressure: The partner may also feel increased stress as they take on more responsibilities, financially or in managing household duties. This added pressure can sometimes lead to tension or resentment if one partner feels unsupported.

How to Handle It:

  • Share responsibilities: It’s important for both partners to recognize the physical and emotional changes that the pregnant person is going through and to take on extra duties when needed. Supporting each other can help alleviate stress.

  • Build a team mentality: Approach pregnancy as a team. Working together, whether it’s discussing finances or planning for the baby, helps reduce stress and strengthens the relationship.

  • Be understanding: Recognize that the hormonal changes affecting your partner are real, and offer your support without judgment. Show that you are in this together and that you’re ready to adapt to each other’s needs.


5. Hormones and Postpartum Adjustment

While pregnancy hormones are often discussed during pregnancy, they continue to have an effect after childbirth, particularly during the postpartum period. After delivery, hormone levels drop rapidly, which can cause mood swings, fatigue, and even postpartum depression. These changes can affect the couple’s relationship as both partners adjust to life with a newborn.

  • Postpartum depression: One in seven new mothers experiences postpartum depression, which can cause feelings of sadness, anxiety, or hopelessness. The sudden hormone shift after childbirth can contribute to this condition.

  • Shift in priorities: Both partners may experience shifts in priorities and emotions as they navigate life with a newborn. This can create feelings of distance, frustration, or even resentment if not addressed.

How to Handle It:

  • Support each other: Just as with pregnancy, it’s important to maintain open communication and support each other during the postpartum period. Offer reassurance, especially if one partner is feeling overwhelmed.

  • Seek professional help: If feelings of depression, anxiety, or extreme mood swings persist after childbirth, it’s important to seek support from a healthcare provider or therapist.

  • Maintain intimacy: Physical intimacy may take time to resume after childbirth, but continue to foster emotional closeness through affection and understanding.


Final Thoughts

Pregnancy hormones play a significant role in shaping the emotional and physical landscape of the pregnancy journey. While these hormonal changes can lead to stress, mood swings, and physical discomfort, understanding and managing them as a couple can strengthen your relationship. Open communication, empathy, and flexibility are key to navigating this transformative period together. By supporting each other and recognizing that these changes are temporary, couples can enjoy a deeper bond and be better prepared for parenthood.

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Related Posts

  • How to Support Your Partner Through Pregnancy: A Guide for Expectant Fathers
  • Managing Stress as a Couple During Pregnancy
  • When One Partner Isn’t Ready for Baby: Navigating the Strain
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