Although it can be quite frustrating for you, but in fact it is normal developmental stage of a child. (theparentszone.com)
Separation anxiety disorder is a diagnosis for children who fall outside the boundaries of this otherwise normal developmental stage. (verywellmind.com)
Symptoms of marital and family distress arise as individuals, couples, and families experience normal developmental stages, face special needs and problems, and / or confront unexpected crises. (azamft.com)